if your only looking for 250hp you can piece together a nice setup. Evo 16g with 10.5 hot side, dsm ex.manifold, Evo intercooler piping (needs some modifications), Evo blow off valve, ecuflash, basically you can translate the whole Evo turbo setup into your car for way cheaper then $3100. but most important thing is tune! dont be cheap when you hire a tuner.
look on
www.evolutionm.net for some good deals.
oh and another important thing is to check your compression on all 4cyl.s to see if your motor is even a good candidate for boost.
GL