unlike R32's, R33's, R34's... the R35 isnt going to appreciate for a while yet. so finance on a 7+ yro "supercar" thats going to be daily driven, probably not garaged, occasionally track used, and potentially worth $10k+ less over a few years.
But i guess its no different from buying any new car. just because other people get $30k loans for a car, doesnt mean its a good idea. people dont usually boast too often about not owing finance on a car, but you can certainly hang shit on people who do owe.