Yep,if you do all of the work yourself like I did you can do it much cheaper but there are obviously people out there that would just pay to have it done.If you don't have the ability or the place to build one then of coarse you have to add labor for tear done full repaint,reassembly,installl,all of the upgrades and so on.My car to be built by a shop would cost alot more than I sold it for.But you are correct doing it yourself you could build it for about $25k including the car.
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Ls1 RX7

SOLD
Chevy Tahoe Sold
2007 Chevy Trailblazer SS Daily Driver
1991 GMC Syclone LSX-V8 TT Swap in progress

2007 GSX-R 750 Track Bike
2006 DR-Z 400SM
2006 Raptor 700R