Not to sound fresh or anything but,I think if your worried about expense perhaps you should reconsider getting one. Here's why...
We got ours in Sept. 1987 for 30K that included landscaping and other extras such as electric vac, light in pool and diving board.
Then about 10 years later we had to refurbish, which included rewire the entire electrical, new liner, pump & filter , auto chlorinator and we added a heater a couple of years ago, that total package was about another 8K.
Then there is the expense of opening and closing and chemicals each year which run me right around $1000 and repairs are usually another couple of hundred because there is always something that isn't running right or leaking.
The landscaping always needs to be updated as well so when you doing your initial scape try to think ahead a couple of years.
We've had a TON of fun as a family in that pool over the years, but it is a money pit! A lot of people don't think of the upkeep when putting in a pool.
This year we need a new auto-vac which will run around 6-8 hundred on top of the gaskets that are needed, oh ya and the...well you get the picture.
Hope I haven't discouraged you too much! They are FUN, but I just vacumed mine for 4 hours yesterday, even though I have electric vac, it still needs a good hand vac every once in a while.