The Insane Engineering of NASCAR Cars : motorsports

I’ve been looking at making the switch to cars from karting but haven’t been able to due to the cost. The series I was looking was the Spec Miata series, but again, it’s just looking too expensive to do.

Is there a way to cut down on costs? I know some teams rent out their cars for a race weekend, how much does this typically cost and would it be better to pursue this route? Or are people able to get sponsors at this level? I know spec miata is a grassroots series, so sponsors are likely hard to come by.