$2500 for a valve job? Find a new mechanic. You can ger an excellent, new OEM head for four or five-hundred bucks or you can get the head machined, with new valves for the same price. You can get a head cheaper than that, but you get what you pay for. A decent shop can get the old head out and the new head in six to eight hours tops.
And six grand for an engine swap is super-insane.
Get some more estimates.
EDIT - I didn't see that you had a V6. Different animal than a 22re. Never mind me!