No clue regarding your question but if you post up the town it's in perhaps one of us can at least do a drive by for you. If you are satisfied by that maybe hire a surveyor for $100 to do a half hour walk through for you.
More than once TF'ers have assisted other TF'ers that way. The whole good karma plan. I'm often shocked to know how many marinas this forum covers. At one point my marina had at least 3 members in it.
Craig - AKA Some Clueless Idiot
The person who is saying something is impossible should not interrupt the person who is doing it.