I did my setup for just around 2K. I'm running a cheap ass turbo that might fail on me, but hasn't yet. A lot of the stuff I have on there is used, and I shopped around to find good deals. I think if you are careful enough, you can build a system, install it yourself, and have someone else tune it for around 2-3K total.
00 ZX3 DD now with over 100K miles
Old turbo: 14b @ 9ish psi: 182.93whp, 188.57wtq (blown seals)
Chinese 16G @ 7psi: 180.62whp 193.6wtq (died at 5,000 rpms)
DSM T25 at 13 psi coming soon (third time's a charm, right?)