diff --git a/Projekte/monopoly/client/src/main/java/pp/monopoly/client/gui/popups/BuyHouse.java b/Projekte/monopoly/client/src/main/java/pp/monopoly/client/gui/popups/BuyHouse.java
index 2030f1a..67b36be 100644
--- a/Projekte/monopoly/client/src/main/java/pp/monopoly/client/gui/popups/BuyHouse.java
+++ b/Projekte/monopoly/client/src/main/java/pp/monopoly/client/gui/popups/BuyHouse.java
@@ -6,8 +6,8 @@ import com.simsilica.lemur.Axis;
 import com.simsilica.lemur.Button;
 import com.simsilica.lemur.Container;
 import com.simsilica.lemur.Label;
-import com.simsilica.lemur.ListBox;
 import com.simsilica.lemur.Selector;
+import com.simsilica.lemur.TextField;
 import com.simsilica.lemur.component.QuadBackgroundComponent;
 import com.simsilica.lemur.component.SpringGridLayout;
 import com.simsilica.lemur.core.VersionedList;
@@ -17,11 +17,12 @@ import pp.dialog.Dialog;
 import pp.monopoly.client.MonopolyApp;
 import pp.monopoly.client.gui.SettingsMenu;
 import pp.monopoly.game.server.Player;
+import pp.monopoly.message.client.AlterProperty;
 import pp.monopoly.model.fields.BoardManager;
 import pp.monopoly.model.fields.BuildingProperty;
-import pp.monopoly.model.fields.PropertyField;
 import pp.monopoly.notification.Sound;
 
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -33,9 +34,12 @@ public class BuyHouse extends Dialog {
     private final MonopolyApp app;
     private final Container buyHouseContainer;
     private final Container backgroundContainer;
+    private TextField selectionDisplay; // TextField to display selections
     private VersionedReference<Set<Integer>> selectionRef;
     private Selector<String> propertySelector;
-    private BuildingProperty selectedProperty;
+    private Set<String> selectedProperties = new HashSet<>();
+    
+    private Label cost = new Label("0", new ElementId("label-Text"));
 
     public BuyHouse(MonopolyApp app) {
         super(app.getDialogManager());
@@ -76,7 +80,7 @@ public class BuyHouse extends Dialog {
 
         downContainer.addChild(new Label("", new ElementId("label-Text"))); // Empty line
         downContainer.addChild(new Label("Kosten:", new ElementId("label-Text"))); // Label for cost
-        downContainer.addChild(new Label("Hier die tatsächlichen Kosten", new ElementId("label-Text"))); // Cost details
+        downContainer.addChild(cost); // Cost details
         downContainer.setBackground(new QuadBackgroundComponent(new ColorRGBA(0.4657f, 0.4735f, 0.4892f, 1.0f)));
 
         // Cancel button
@@ -92,11 +96,9 @@ public class BuyHouse extends Dialog {
         confirmButton.setFontSize(32);
         confirmButton.addClickCommands(s -> ifTopDialog(() -> {
             app.getGameLogic().playSound(Sound.BUTTON);
-            if (selectedProperty != null) {
-                System.out.println("Confirmed property: " + selectedProperty.getName());
-                // Send the "alter building" message to the server
-                // app.getGameLogic().sendMessage(new AlterBuildingMessage(selectedProperty.getId(), false)); // TODO
-            }
+            AlterProperty msg = new AlterProperty("BuyHouse");
+            msg.setProperties(selectedProperties.stream().map(p -> app.getGameLogic().getBoardManager().getFieldByName(p).getId()).map(p -> (Integer) p).collect(Collectors.toSet()));
+            app.getGameLogic().send(msg);
         }));
 
         // Center the popup
@@ -130,22 +132,20 @@ public class BuyHouse extends Dialog {
 
         // Populate the dropdown with property names
         for (BuildingProperty property : playerProperties) {
-            propertyOptions.add(property.getName() + " (ID: " + property.getId() + ")");
+            propertyOptions.add(property.getName());
         }
 
         propertySelector = new Selector<>(propertyOptions, "glass");
         dropdownContainer.setBackground(new QuadBackgroundComponent(ColorRGBA.Orange));
         dropdownContainer.addChild(propertySelector);
 
-        // Set initial selection
-        if (!propertyOptions.isEmpty()) {
-            onDropdownSelectionChanged(propertyOptions.get(0), playerProperties);
-        }
-
         // Track selection changes
         selectionRef = propertySelector.getSelectionModel().createReference();
 
-
+        // Initialize the selection display here
+        selectionDisplay = new TextField(""); // Create TextField for displaying selections
+        selectionDisplay.setPreferredSize(new Vector3f(300, 30, 0));
+        dropdownContainer.addChild(selectionDisplay); // Add it to the dropdown container
 
         return dropdownContainer;
     }
@@ -156,36 +156,43 @@ public class BuyHouse extends Dialog {
      * @return List of BuildingProperty objects owned by the player.
      */
     private List<BuildingProperty> getPlayerProperties() {
-        Player currentPlayer = app.getGameLogic().getPlayerHandler().getPlayerById(app.getId());
+        Player self = app.getGameLogic().getPlayerHandler().getPlayerById(app.getId());
         BoardManager boardManager = app.getGameLogic().getBoardManager();
 
-        return boardManager.getPropertyFields(currentPlayer.getProperties()).stream()
+        return boardManager.getPropertyFields(self.getProperties()).stream()
                            .filter(property -> property instanceof BuildingProperty)
                            .map(property -> (BuildingProperty) property)
                            .collect(Collectors.toList());
     }
 
+    @Override
+    public void update(float delta) {
+        if(selectionRef.update()) {
+            onDropdownSelectionChanged(propertySelector);
+        }
+    }
+
     /**
      * Handles property selection changes.
      */
-    private void onDropdownSelectionChanged(String selected, List<BuildingProperty> playerProperties) {
+    private void onDropdownSelectionChanged(Selector<String> playerProperties) {
+        String selected = playerProperties.getSelectedItem();
         app.getGameLogic().playSound(Sound.BUTTON);
-
-        // Extract the ID from the selected string
-        int idStart = selected.indexOf("(ID: ") + 5;
-        int idEnd = selected.indexOf(")", idStart);
-        String idStr = selected.substring(idStart, idEnd);
-        int propertyId = Integer.parseInt(idStr);
-
-        // Find the selected property
-        selectedProperty = playerProperties.stream()
-                                           .filter(property -> property.getId() == propertyId)
-                                           .findFirst()
-                                           .orElse(null);
-
-        if (selectedProperty != null) {
-            System.out.println("Selected property: " + selectedProperty.getName());
+        if (selectedProperties.contains(selected)) {
+            selectedProperties.remove(selected);
+        } else {
+            selectedProperties.add(selected);
         }
+
+        int cost = 0;
+        for (String s : selectedProperties) {
+            cost += ((BuildingProperty) app.getGameLogic().getBoardManager().getFieldByName(s)).getHousePrice();
+        }
+
+        String display = String.join(" | ", selectedProperties);
+        selectionDisplay.setText(display);
+
+        this.cost.setText(cost+"");
     }
 
     @Override