I’m six foot four and I have no trouble at all getting into my wife’s mini-cooper. If I put the seat all the way down/back, I can can extend my arms dead straight and in fact it’s a little too far back. I assume you’d be ok in the mini to six 6 or so, then you’d want to make some changes.
I not really a car guy–If I had t send a hundred grand I’d go to a custom guitar maker and have a couple really nice guitars handmade.
If it had to be a car i’d get an old Checker cab and have it reworked into kind of a low rider