beware of barefoot charters
The fact that you did not investigate the charter company or the rules and regulations that go with is not other''s concerns.
What you did was buy a boat you wanted and tried to make money from it with no responsibility on your part. If you shared the idea with whoever sold you the boat, shame on them for selling it to you.
S#*t happens during charters. The smart realize this. Too often the marginally wealthy assume they can get a boat too big for their means paid for thru chartering, yet they are too stupid to realize the actual situation. And the buyers often "can''t" pay for the insurance. But, the owners still want all the lovely benefits, such as their boat being paid for by strangers, without any regard as to what happens to the boat.
Those with know-how do buy boats to put into charter with a reputable company, use it during that time, then take it out of commission (sometimes not in the greatest of shape - I have delivered those back to the states!) and sell it. These are the best buys on the market.
I am sorry for you, but perhaps you put yourself in this situation by seeing dollar signs instead of wind vanes.
Best of Luck,