Instead of looking at it from the perspective of what you want to do, and how much that would cost you, look at it from how much you feel comfortable spending and what you can then get for that. The more you spend, the more you'll get. Do you want to pull the engine and ship it to somebody? If so, factor that in. If the engine is in nice shape, shipping it to to one of the "big names" on here, along with three or four grand, will turn it in to something completely different.
