Why not pull the engine yourself and reinstall it after someone does the rebuild? We used the main halyard and a twing on the boom to position the lifting point over the aft end of the companionway. I built an engine stand from 2x4's. Having gone through this I would have two people inside to help position the engine on the stand in the boat. If the mechanical part of the engine rebuild is too far over your experience level, you can probably save a bunch of money doing the work of disconnecting hoses, harnesses, linkages, shaft and engine mounts, then pulling the engine yourself. Go to my website listed above and download the Yanmar manual to scope it out. My rebuild did not include rings or bearings because I wasn't loosing power and not burning oil. Cost including all new hoses, gaskets, etc. was around $400 and lots of labor of love.

Bill