I remember you have awesome tools in your garage, but I didn't see an engine hoist. You would need one (or two), but don't go out just now and buy one if you don't yet know if you'll do this. Probably most important is an FSM. You'll need one for your car, and perhaps for the donor.
There have been a few posts here of teams of people doing engine swaps, but not much of the process is shown. Mostly you see beer pictures.
You're under 21, so find someone old enough and have him/her drink beer while you work. It'* not easy to take out an engine by yourself. You should probably find a few forum friends in your area who have done this before and are willing to come over and help you do this. With a large team of people and you doing this for the first time, this is roughly a 10 hour (240 beers) job.
Overall, though, given the complexity of the work, the required tools, and the labor, the $2800 rebuild price isn't too bad considering the guy running the shop isn't doing the work for free. He might be in an expensive area, so his building'* rent and property (and other) taxes may be high. Ask around some more.