I recently inherited a 4,400 gallon Intex pool, and I'm starting to wonder if I've bitten off more than I can chew. How much does it usually cost per month to maintain a pool like this? (I expect only two people to use it a few times a week, with a few guests on rare occasions.)

Also, is an SWG worth considering? How would the costs compare vs. the simple Intex recipe?

EDIT: My husband and I are both disabled and low income. Water and electric are included in our rent.