It looks like a nice little mini-game. There are only three stats here and they are all used, which I think is good. The individual steps also feel complete and, together with the hard mode options, this could be quite fun. Here, the other dice are also used a bit. I like it.

I just wonder what the gp in the "Type of Car wanted" table says about the car? I don't know anything about cars, maybe it's obvious.

I think if one works on it a bit more and maybe adds a few more rules, it could even function as a solo RPG.