more pics of the piping would be good, if possible. fabbing that is probably the main PITA about the whole thing. bend, test, fit, bend, test, fit, repeat, repeat, repeat.
i feel building up a DIY turbo would be easier if you could get the piping from someone, then add as you go and can afford. keeping it budget would have to include some way of using the stock manifolds or MSDS. warmonger can chime in one that one, as could Blackwidow, and maybe stilov? water injection is also a cheaper and more easily added afterwards than intercooling.