PG and Okie make good points. I'm afraid the cruising industry is not geared up for your needs. In fact I would be very surprised if most land based vacations are as well.
But having said that that it is important that you guys get a vacation that will allow you all some special time.
Right now I cant see any other alternative. But I agree maybe at a price such care could be made available and allow people some time to recharge their batteries, it will come one day