Man, your set of shop interiors is just... I damn good idea, it so much helps with the NFSU2 vibes and nostalgia effect.
In the future, it would be cool if every shop (individually, not shop type) in the map had a different interior, also based on other NFS games like Carbon, Most Wanted, and any other that has those. It would be that touch that just screams «attention to detail». It's a lot of models, though.
Is the garage made with ingame assets, custom models or both? I don't remember seeing those engine block anywhere in the game, but I do recall those TVs from somewhere.
Also, is the platform where the car stands meant to spin, like in U2? That'd be cool AF, but, is it possible to lock the camera movement to a single axis so it only moves vertically?