The most common failure problems are. Leaving the pool without water in it, even one complete day is too long, the liner shrinks, then tears upon refilling. Torn liners, it is always a people problem. Buy the best pool you can afford. The equipment is the most important part.
Good equipment is the way to save money.
The first year buy everything at the pool dealers and ask questions like crazy. Stay out of the discount store until you learn what you are doing. Do not assume everything is OK, Take the water in monthly for the first year, and don't buy what they tell you, you need, unless you understand why you need it. Following the above advice will save you the cost of a new liner ,3 seasons down the road. If someone tells you that you won't need any chemicals, if you by their latest gadget, run for the exits, its not true.