I'll offer another idea.
If there is another knowledgeable C-Brat in the area where the boat is, have him or her go over the boat for you.
Better yet, if there are two or three C-Brats, have them do the job together. One may spot something the other misses.
And no one knows the boat like an owner.
The surveyor may be more knowledgeable in some areas, but the owners know the particular weak and trouble spots of the various models, and can judge the boat's condition, the work required to correct, and the cost factors, better than anyone. They've BT,DT!!!
We did this for prospective fleet members in our sailboat racing days, and could do an excellent evaluation as well as a value determination.
Could even bring along an experienced hard-line negotiator for the price deal, if desired, or necessary.
Then, after buying the boat, we'd tow it home with the new owner and go out to dinner and hoist a few to celebrate the new boat and fleet member!
Everybody wins! (At least on the buying side!)
As always, gotta' out think 'em!
Joe. :teeth :thup