I'm not too familiar with the H22 into Accord swap but I'm assuming you'd need the engine, transmission, all associate parts, etc. I think it bolts in though with no need for custom mounts, with a certain degree of mixing and matching of Accord and Prelude parts.

The H22 swap itself is actually kind of affordable, you should be able to get a complete engine, transmission, ECU, etc, for under $2500. Figure a turbo kit such as RevHard, Drag, etc is another $3500 or so. From there to get it running nicely you'll need a Hondata s100 with boost option, and some 450 cc/min injectors. Most turbo kits have some kind of upgraded fuel pump. That's $445 for the Hondata, you can get more goodies for more money. Then injectors are like another $350 for brand new RCs. Figure about 7 grand right there for the core items.

You'll also probably need to replace wear items on the engine, and you'll need to beef up things like the clutch and everything else. Labor, I got no clue on that one. So like I said, with a total budget of 10 grand you should be able to get a reasonably well set up H22 turbo going on in there.