I wouldnt attempt building a fiero for less than $2000.... I did it for half of that, but I also spent a bit more time collecting parts vs paying alot for them.

As far as a turbo setup goes, I have never spent more than $1000 on any turbo kit i have built on a fiero. Intercooler, turbo, injectors, wastegate, bov are the main turbo parts you need, the rest is little stuff.