Just happened to see this post while searching for something. We financed our pool at our Cape Coral Florida home with Lyon at a low interest rate (it was less that 5%) that was in 2011, they were easy, nice and it was all finished in less than a week. Our pool builder recommended them. Your pool builder will have recommendations, get your build plan first and then explore financing options. We paid it off by the end of 2013. We also financed our pool for our main home in Kentucky in 2003 we did that loan through Fifth Third Bank and paid it off by late 2005.... but would not go through a large bank if we were doing it again. We paid both pools off way faster than the loan term. I like to take longer terms and then pay off early while making sure that if some thing horrid happened with our income I could still make the minimum payments. Our Fifth Third interest rate was higher than our Lyon but it's impossible to compare due to difference in years and I am not sure where our credit scores were for each at each time etc. By the way,, we are avid swimmers, both my spouse and I competed and met each other as lifeguards. Pools matter to us, we will have a ton of people in our within the next hour as we are having a large grill out party 
... Have fun with your build!
