No, I've been affiliated with the charter industry in one way or another, and had my own boats in charter, since 1994. You will probably lose less money with a boat in charter, but you will not make money.
A Moorings 50 Tboned another Moorings 50 in the recent Heineken Regatta in a Port and Starboard incident in 30 knots of wind. That left a BIG V in the boat on Starboard tack - damaged hull and deck and i am told the galley moved about two feet sideways...........glad it was not my boat.
This would leave me to wonder what the insurance conditions are....?? It would appear that insurance prices would be a bit higher.(??)
If the owner visits and uses the boat regularly, the issues when it comes out should be minimal. It all depends on the contract, but the boat is expected to be kept in good condition so if it's a "floating wreck", it would be the responsibility of the charter company to rectify that situation.
Chartering a boat here in Thailand is one of the many schemes I've been pondering. I live close enough to Phuket where it would be moored to keep on eye on it and use it frequently and that's a big plus the way I look at it. Also, the ability to use some of the 12 weeks at other locations is attractive.