The decision to do something about the heads is forced by the condition of the existing drain plumbingof the aft head, all behind cabinets or tanks. This drain line has been plugged for years.
PO used it as a urinal, draining directly overboard, with the forward head only draining to the waste tank.
First estimate was 2k to redo or repair bc of location of the line. The existing y valve and related plumbing at the forward head also fail current regs.
That led me to the composting heads, but as little as I know about the alternatives, I am open to any suggestions.
We intend to live aboard at a marina near Stuart FL for 6 mos to a year, while learning about our boat and getting experience cruising in her.
We may later cruise the east coast and the Bahamas, or even try the great loop. She should be capable of the loop as she draws only 4' 8", and the mast is hinged.
Thanks all for the welcome and the advice.