If I didn't have to dork around with the broken head bolt on mine, I probably could have done the head gaskets in a weekend. A good deal of my time was just cleaning the heads up. I highly recommend taking them in to a machine shop to be cleaned, checked, and new valve seals installed. This isn't terribly expensive and can save you a big headache if one of the heads has an invisible crack. They also come back shiny clean, which insures a better seal when you reinstall.

Now that I think about it, you should call some local machine shops/engine shops to see how much it would cost for them to go through your engine and rebuild it. It might be considerably less than $3500 and you know your engine is mostly good. At 200k, new rings and bearings wouldn't hurt at all. You can still save a big pile of money by doing the pull/install yourself.

A final note: the gaskets for around $90/set on ebay are not all that great. At least the intake gaskets are worthless and will disintegrate within a month. I just got done putting OEM intake gaskets on mine and will post pictures of the old gaskets someday soon.