What do you think is the cheapest you can possibly build a zetec turbo engine?, presuming that the management and turbo side of things is taken care of ?

The things I can think of that need doing are:
Fabrication to inlet manifold to allow injectors
New bolt holes for exhaust manifold
Decompression plate
Blocking of breathers and oil return

I know people are going to have a fit for me saying decompression plate, but im just trying to keep things as cheap as poss.

Im just thinking that if I can find an appropriate donor 2ltr zetec engine for say £200 (is this reasonable?), then what other costs I would incur just to get a very basic up & running zetec turbo engine.

Thanks.