I scrounged up two Vendetta rollers. One is pretty nice, and one will be just for parts until I put some money into it. These will be my starting platform.
I already spend $50 on a motor and $80 on a used MM I've had forever. I need to get a set of tires, batteries, and maybe a diff or two and I'm set. The budget is $200 after the roller, right?
This won't be the most off-the-wall project, but it will be brutally fast. Not even funny fast. If I can enter in my micro T... Man that's off the wall for sure.

Don't know if it qualifies though because it's not 18th scale.