ATS Mod Protection System

I have a collection of premium American Truck Simulator mods and I need them wrapped in a solid protection layer, similar to what Modfy offers. The goal is simple: only legitimate buyers should be able to install, launch, and keep using the mods... (Budget: $30 - $250 USD, Jobs: C# Programming, C++ Programming, Delphi, Desktop Application, Encryption, Game Development, Software Engineering, Windows Desktop)