I would say the first question is where are you going to put it and do you have a level site? If not, what is involved in leveling it? How much effort/cost? My first pool I THOUGHT I had a level yard for an Intex 15' donut.... I had to build a base and when I was done, the southeast corner was flush to the ground but the northwest corner was 15" high!
My second (current) pool also needed a base but being 40' long that same NW corner is about 3' high, and the SE corner is flush.

Carl