I highly advise you look at getting the Sand Filter when you can. I've had mine up about two weeks, and with the stock filter running 6 hours a day it could just not keep up and my water was starting to cloud. Now, I do live in a rural area so lots of opportunity for organic matter to find it's way to the pool.. so YMMV. But from my research the stock pump is less than adequate and will eventually fail. You don't want to be stuck with a green pool while waiting on a new pump.
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and btw 1.76lbs per sq inch doesn't sound like alot, but figure it per square foot and it's 250LBS a square foot... basically 51,000 lbs of water total. if I had to guess the weight on the legs is about 1000lbs on each one
There is not even close to 1000 lbs on each leg. The poles are not very strong and the plastic feet would not survive. The design of the pool is not that different from the blow up ring pool which has no poles.