VB.Net ERP Framework Prototype

I’m putting together a lightweight ERP foundation and need a clean, well-structured VB.Net solution that I can grow over time. The stack is fixed—VB.Net with DevExpress WinForms controls on the front end and PostgreSQL on the back... (Budget: €250 - €750 EUR, Jobs: Database Management, Menu Design, PostgreSQL, Software Architecture, Software Development, SQL, VB.NET, Visual Studio)