Really the goal would be able to use the pool 10 months out of the year. March-Dec. Since even in the coldest months the days are in the upper 60's and the nights are in the 50's. I don't expect to be able to swim when it's less than 65 outside (I'd freeze just going outside in a swimsuit).

I would like the pool to be in the lower 80's in the spring/fall so that it is usable. When you spend that much money you want to use it.

The pitch on the roof is low (no snow here). So maybe that is in my favor.

Is it true that the heat pump must be on all the time b/c it will take like 12 hours to heat the pool otherwise? The days already are in the high 90's and the nights in the upper 60's.