Custom Desktop Data Management Software

The goal is to build a desktop application that centralises and streamlines data management for my daily operations. I need a full-featured program—installable on local machines—that lets me import, organise, search, edit and export datasets without relying on a web browser or cloud connection... (Budget: $250 - $750 USD, Jobs: .NET, C# Programming, C++ Programming, Database Development, Desktop Application, PHP, Software Architecture, SQLite)