Total cost depends on options (head work, port matching, don't forget tuning!) Labor charge I pretty much have nailed down- I quote ~20-24 hours of labor for everything (build 3L if necessary, remove old engine, swap over everything, install 3L, shakedown test), but that's a pretty generous figure and I usually come in under that.
However, my wife and I are expecting in August- So past mid-July, I'm not taking any more work for the foreseeable future. So this is probably the last one I'll be doing for a while.