Reverse CAD Drawing for Tiny Home Trailer

I'm seeking a detailed CAD drawing of a fully converted semi-trailer that has been turned into a tiny home. This is required to submit to the county for approval.

Requirements:
- Structural and mechanical details: load-bearing walls, support beams, etc.
- Interior and utility layouts: kitchen, bathroom, living areas, water/gas lines.
- Electrical and plumbing schematics: wiring, pipe layouts, etc.

Ideal Skills and Experience:
- Proficiency in CAD software
- Experience with tiny home or trailer designs
- Knowledge of structural, electrical, and plumbing systems
- Familiarity with county approval processes and requirements