well.. just one of the problems... the KINKING!!
http://www.thesteele.net/nokink/tightbend.html
http://www.thesteele.net/highfsb/highfsb.html
that guy took the vinyl and heated it up to put the bends in it. this makes it look damn clean, and keeps the kinking problem out.
not claiming this is a solve all for vinyl... but it make vinyl more of a viable sollution for the budget.
(cant wait for my tygon...)