Advanced 5M Role-Play Server Setup

I'm looking for an experienced developer to create a customizable 5M role-playing server.

Key Requirements:
- Custom Jobs and Economy: Design unique jobs and a player-driven economy.
- Custom Maps and Locations: Create or integrate new maps and locations for immersive gameplay.
- Unique Vehicles and Weapons: Introduce a variety of custom vehicles and weapons.
- Advanced Character Customization: Players should be able to modify skills and attributes.

Ideal Skills and Experience:
- Proficiency in 5M server development
- Strong scripting skills (Lua, C#)
- Experience with game design and player economy systems
- Familiarity with custom assets (maps, vehicles, weapons)
- Knowledge of character customization systems

Please provide examples of previous work and an estimated timeline.