The pool place we use only deals with in-ground pools. They say almost nobody maintains above-ground pools. So... this sounds like an opportunity to me. If one could systemitize the maintenance of above-ground pools: filters, chemicals, remote sensorts, maintenance schedule, etc. There should be a good business there. Then one could franchise it, or at a lower cost do a business process syndication on it. To really make it go, one would need a counter-seasonal business to run in the cold half of the year with similar manpower and skills. Maybe chimney sweeping, duct cleaning, or... I don't know, what are your ideas?