for me, i prefer u get an old EK and put a vtec inside, or use wira/putra/satria with mivec inside...if wan faster, use iswara chasis...
the reason is, not all of the people can handle turbo car..and it is a rent car..so no one want to see anything happen...
btw, i think u are just starting this business, so i think u will only do some small busiiness which mean to those beginner..so it's very dangerous for a turbo charge kelisa flying with beginner in track with the power of the engine...
my opinion, risk = 70% (kelisa turbo+beginner) even with roll cage or watsoever
if use sedan car, at least it wont be so dangerous.
i m really interested in this..hope to hear ur good news soon, i prefer sedan car or hatch back with NA inside even i had drive evo for race.....start slowly...hehe
hope the rental will be affordable