How did the tiles work out on the uneven floor? I’m thinking of doing the same. I re-did the walls, along with power and lighting last year, and used Gladiator cabinets as well. They are great.
It all depends on how you are going to use the car. For me, the PP isn't a big deal, but others have to have it. OTOH, I like the premium features, so that's what I bought. I'll likely add some suspension stuff and wheels at some point, but that's easier to do than adding the interior bits...