We are thinking of leaving our boat on land (it is currently for sale) after we have done our usual winterizing. We wonder if there are long term considerations re the engine, batts and other working systems. We do not want to damage anything during this time. We are probably going to continue the battery charging that we usually do over the winter but also wonder if we should just plan to buy new batts when the boat is sold. Is there anything else that we should do for the boat's long term care?