Its not that rare to find these setups second hand.
I got the bodies, trumpets, loom, DTA ECU, FPR, manifold for about £900.
I have also spent about another £400 on bits and bobs and then its off to get it all setup properly - about another £400.
It all adds up. There are corners that can be cut price wise by constantly looking and waiting for the right things to come up second hand but in the end its going to cost you a lot of money.