Pools are like any other hobby. They take some time and money, but if you enjoy it, do it.
We have an old, 24' round pool. I added several inches of sand under it so that it ended up being only 3 ft deep. That was good for the kids. You can't swim laps in it but there is an alternative... they make bungee cords that velcro to your ankles. The other end gets Velcro's to something immovable, like your deck, etc... Then you can swim to your heart's content and get some really good exercise without going anywhere /forums/images/graemlins/tongue.gif
Get a fence around it, even if the ladder tips up and locks, get a fence. Check your state laws regarding this.
Get a solar cover. Spring for the heavy duty ones. The thin ones only last a couple years.
Get a solar cover reel. It makes for easy storage and off/on of the cover by one person. Also, store the cover in the shade. Once you take it off the pool, the sun will heat it up and cook the plastic very fast.
Investigate the cost of an automatic pool robot to do the cleaning for you.
Invest in a timer for the pump.
I spend about 10 minutes working on our pool each week. That's it. This involves a chemical check, top off the chemicals as needed, brush the side walls by hand where the solar cover meets the liner(our robot won't get that part and there always seems to be a tiny scum line at that point), and check the pressure on the filter. Backwash and fill pool as needed.
The only problems we have to watch for are lack of or excess rain. Rain can overfill the pool, diluting the chemicals. Drought requires adding water from the hose, which can change the chemistry and add metals(we are on a well).
Really, though, if you do it right, it doesn't take that much maintenance and you get lots of enjoyment out of it, weather permitting. /forums/images/graemlins/laugh.gif