I am in the process of building an in-ground pool in my house. I need to know which VFD pump and cartridge filter would you recommend. Also, how many returns, main drains, suction lines, and skimmers are needed that would produce a more efficient system overal and better circulation of the water.The pool will have a hot spa, and a small veil. The pool is “L” shape with dimensions 20 ft x 8 ft one side and 12 ft x 8 ft with a depth of 4.5 average. Would you quote me a pump and filter… heater? Please include shipping and handling to Puerto Rico 00646… Thanks