I have a 9x6x33in H, appx 1000 gal, Bestway Power Steel above ground pool in my garage, with a wall 2 point tether for perfect resistance swimming. It came with a 120 v, 330 GPH filter pump with 2 intake hose to "T" connector hose, 1 output hose, no valves. This summer runs 77-81 degrees, perfect for lap pool. Its in an attached fully insulated garage, thus lowest temps around 40 degrees in winter. I have a dehumidifier, air purifier with carbon filters and Delonghi oil radiator heater, all for cold, damp areas to 40 degrees. The pool is surrounded by a 10x10 tent to keep drywall dry and closed off for warmth, solar cover for evaporation (and have heavy tarp) and has 1/2 inch padding and 2 tarps under for some insulation. I can not find a Bestway 120v heater that can go with my low output filter, on backorder and not sure about supplies as fall approaches. One typical wall two plug outlet/surge protector and electrical box surge protector can handle this option. But I am willing to upgrade my filter and heater and possibly put in a 240v line. Saw FibroPool FH120 Above Ground Pool Heat Pump (good to 40 degrees), steep $1260 on Amazon and at least a 1200 to 1500 GPH pump needed too. Also, I would need better hoses, shut off valves, bypass valves but at least not an electrician as its a 120v. Can a novice like me put that kind of system together? Is this even doable for winter, and are there any less expensive options? Help Please!