I love my 4runner. It is worth the money to do the swap. I forgot how much I have in mine but definitely worth it.
Now to pay someone to do the swap... If you can get some one to do it under a K note, it would be acceptable. I would probably set a budget limit of 3.5k or so. (maybe same cost as trd supercharger)
Anyone thinking about doing the swap and waiting for their existing motor to blow first, don't. Just do it. You old motor is worth more (almost the same price as a V8) alive. People can test drive and hear it run.
Sell the old motor with the electronics, pumps, air and exhausts as conversion swap for the older 4runners, pick ups and MR2's.