This interior is built based on street racers and tuning cars.
This model have 6 Rooms in Main Building and 6 Rooms in Vip Showroom (Exterior entrance) 
 
Main Building:
Garage, Paint Booth, Showroom (for 3 Cars), Office, Bathroom. UPDATE V2 - (Dyno Added - Optional)
Second floor - Warehouse, Secret Room (Door in bench tools) 
 
Vip Showroom:
- Garage, Meeting Room, Kitchen, Office 1, Office 2, Showroom (for 3 cars)