diff --git a/Admin/Install/db.json b/Admin/Install/db.json
index fb357bb..3c7b4d4 100644
--- a/Admin/Install/db.json
+++ b/Admin/Install/db.json
@@ -36,8 +36,13 @@
                 "type": "INT",
                 "null": false
             },
-            "projectmanagement_project_budget": {
-                "name": "projectmanagement_project_budget",
+            "projectmanagement_project_budgetcosts": {
+                "name": "projectmanagement_project_budgetcosts",
+                "type": "INT",
+                "null": false
+            },
+            "projectmanagement_project_budgetearnings": {
+                "name": "projectmanagement_project_budgetearnings",
                 "type": "INT",
                 "null": false
             },
@@ -56,6 +61,11 @@
                 "type": "DATETIME",
                 "null": false
             },
+            "projectmanagement_project_endestimated": {
+                "name": "projectmanagement_project_endestimated",
+                "type": "DATETIME",
+                "null": false
+            },
             "projectmanagement_project_progress": {
                 "name": "projectmanagement_project_progress",
                 "type": "INT",
diff --git a/Models/Project.php b/Models/Project.php
index 84a4048..d4613e3 100644
--- a/Models/Project.php
+++ b/Models/Project.php
@@ -87,10 +87,10 @@ class Project
     /**
      * Calendar.
      *
-     * @var   Calendar
+     * @var   int|Calendar
      * @since 1.0.0
      */
-    private Calendar $calendar;
+    private $calendar;
 
     /**
      * Current total costs.
@@ -185,14 +185,15 @@ class Project
         $this->end   = new \DateTime('now');
         $this->end->modify('+1 month');
 
-        $this->estimatedEnd = clone $this->end;
+        $this->endEstimated = clone $this->end;
         $this->createdAt    = new \DateTime('now');
 
         $this->calendar = new Calendar();
 
-        $this->costs    = new Money();
-        $this->budget   = new Money();
-        $this->earnings = new Money();
+        $this->costs          = new Money();
+        $this->budgetCosts    = new Money();
+        $this->budgetEarnings = new Money();
+        $this->earnings       = new Money();
 
         $this->setName($name);
     }