again, it depends-how much you gonna rebuild it? total STOCK rebuild? account for a minimum of about 1000-1500. add on another 1000 buffer. Im doing a TOTAL rebuild of the engine, added arp rod bolts, arp headstuds, 2mm titan HG, got the rods/crank re-sized for standard bearings, and lots of new parts (clutch, oil pump, throwout bearing, pilot bearing, thermostat, waterpump, etc just to name a few) and ive spent about 2000-2500 including machine work. not too bad if you consider that it will be ready for a turbo and a good amount of safe power after this.
another thing you might not have considered but is a very real problem, if you've never dealt with this kind of stuff before (and which I've recently learned the hard way), is that people (specifically machine shops) will try and pull the wool over your eyes-and expect you take their word for it when they say "its good to go" after you pay them 1100 in machine work to prep your engine. That thing you are so desperately slaving away on so you can again drive your beloved car. but they really don't give a crap about you, or your car, they just want their money. You need to check the machine shop's "work" once you get it back, make sure they did what they said they did-correctly. If that means spending more money by going to another machine shop to have it checked, so be it. This is where that "buffer" comes in. so even more research on your part is necessary here....you need to find a good shop if you can.
anyway, im blathering to much, so Ill end it here. I have my doubts that you could turbo your engine (if you dont already have tools, time, and big tools like engine lifts etc) for 1500, maybe 2000 if you had a mostly good engine that just needed a basic rebuild-and non of the parts, like coolant hoses for example, needed to be replaced. dont forget that 300-600 dollar turbo (300ish used, 600 new).
---------- Post added at 07:44 PM ---------- Previous post was at 07:41 PM ----------
and ditto to what Habanero said, this place is the best.