ARMA 3 Custom Map Development

I need a map for ARMA 3 that's 10 by 10 kilometers—completely flat, just a vast desert with no clutter, no buildings, just sand. The roads need to be laid out exactly as I provide, and I want them either asphalt or dirt, 8 meters wide. I'm only using the default ARMA 3 assets—no external mods—just the built-in desert textures. Once you've built it, I need a fully working version with no errors, so it runs in both single-player and multiplayer. After that, just send me the final file and the project files so I can tweak if needed. Let me know if you need any clarifications
Contract duration of less than 1 month.
Mandatory skills: Game Design, 3D Modeling, 3D Design, Game Development, Game Testing, Game UI/UX Design, Level Design, Game Art