Actually, I bought my Off-Road cab from a BYOAC user- after I had already picked up some ebay wheels. (have to put those up for sale, one of these days..)
Not much point in doing 4 wheels, like the man said, practically no games support that many. (add Indy 800 to that list!) I'd just do three. (Actually, I am!)
As for consoles, since they're all 270 deg games, you can't really use 360 wheels with them, so stick with MAME games if you like the 360 wheel feel.
I'm not aware of any way to make a 360 deg wheel play 270 deg games. At least not one that plays well.