Shutup:
I used to install inground pools and a couple of things to be thinking of:
1. In Minnesota plan on spending at least $1,000 for the summer to heat the pool
2. The first few years of pool ownership, people go wild with testing, shocking too much, algicide this, and chemical that. Plan on spending about $750 for the first few years on Chemmies
3. I would highly recommend spending $12k on an auto cover. Those blue bubble covers suck, and allow the chemicals to evap out of the pool. You keep all the snakes, grasshoppers, mice, frogs, bees, flies, leaves, worms out of the pool. Also if you have little kids, the auto covers will keep them safe if they fall in while the cover is closed.
Believe me, after you have the pool for awhile you will hate rolling up that blue POS cover. Auto cover, push the button and it rolls open/closed in a few seconds.
EBAy has great deals on Polaris auto cleaners. I had a buddy of mine pick one up last year, brand new for $250. I think the pool company wanted almost a grand for the same thing..........
If your still looking at this house and are considering buying it, I would pay a pool company to come and check out the heater, pumps and assess the general condition of the equipment. You do not want to have to buy a new heater shortly after you buy the house.....
Good luck!