As far as hobbies go there are a relatively small
number of people interested in old outboards
and for the most part they are looking for motors
that need repair or nice originals to preserve the
history. Repair could just be enough to use it
again to a complete restoration as you describe.
Even if you ask for half of what you would have
in the type of restoration you describe most would
still buy a project. If done properly it usually
makes more sense financially to buy a done motor
but that is not what this hobby is about. There
are those that will buy a restored motor but that
number is small ( unless your almost giving it away)
and the number of them that would pay what you
would have invested leaves you with a minuscule
market. Complete the motor you have and offer it
for sale at what you feel is a fair price. One motor
shouldn’t break you. That will give you the best
sense on the market.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.