as for turbo'ing funds, you can go the cheaper 'budget' route whichc an be done for less than a Grand, it involves using two Focus RS head gaskets and a de compression plate to lower the compression ratio a bit, using escort RS turbo exhaust manifold and turbo, and modifing either the RST inlet to fit the zetec, a modified zetec cast inlet, or using a modified rover turbo inlet, the injectors need seing too also some use vauxhall redtop ones, but personally i see that as a sin

also using an RST oil feed for the turbo that connects to the oil pressure sensor, but your restricted to less than a safe 10psi of boost due tot he gasket and compression plates
although the Frst T2 can be used but ive seen it being more difficult to find the right hybrid hoses for it
or using the proper stronger and more reliable route but working ont he internals, forged low compression pistons, stronger steel Con rods a better headgasket turbo oil feed from the sump a custom made manifold and turbo flange
its alot more rewarding and wont require you to come back in the near future to make it a proper turbo build, also you can run as much boost as your turbo can support
