Why is there sometimes a wide margin of difference in price among builders?
Price is usually relative to quality in your business. A builder can pass along a savings to you if he pays less for the work himself. The better builders use the finest available equipment and subcontractors, resulting in a better built product with less warranty troubles. The pool could cost as much as 20-30% more than a pool built under the “price” philosophy.
Considering the time spent owning the pool, the additional cost up front is usually a better value in the long run if it helps avoid costly repairs.