It depends on conditions you got to work in sam. It's taken me a while to do because I haven't got garage space to work under cover (4 motorbikes in there most of the time), so I have had the weather to put up with. It's really simple to do a straight forward conversion but I've gone for the mk3 running gear which gives abit more of a wider track then the standard. Plus everything has either being undersealed, recon'd, bought new, or uprated. The only bits that have cost me anything or going to cost is, new coilovers (because the 1's on won't adjust so they're stuck at 90mm drop) and the custom exhaust.
Best donor car is the corrado, but I couldn't justify taking a good 1 to bits so I got a mk3 instead. still needed parts from a vr6 corrado but they're like rocking horse s*** to find in salvage yards.
I got a Spare engine that's being bored out and I think it's going to get built with a supercharger. (unless my BMW get the charger, can't decide hehe)
I couldn't put a price on it because it's not finished yet and I got the donor mk3 for next to nowt.