Replacing the Auxiliary
In the boat I'm looking at, the existing engine is a 23HP Volvo that's now over 30 years old and it looks like it needs replacing. These are said to be noisy and vibrate a lot. So having a new engine would be a plus. Comparable boats with newer engines run $15K+ more than this one.
With the engine replacement you would also replace hoses, exhaust, gauges and maybe even controls. I can do the electrical, gauge installations, any woodworking (if necessary) and maybe a few other things.
If I had a yard install the engine and hoses and I took care of the rest, any idea what would the price range be for that work?