Sorry to state the obvious but you should find a guy in your area that has "pool" hardscape experience. This project could obviously be a real challenge/nightmare for you. Most guys with poll decking experience will find the time to walk a site with you and make some suggestions. I agree with most all of what was said above, you just have so much more to consider (labor) when your dealing with pools (expansion) that it could cost you (cracking liners) dearly.
