I have an Aquasport 52 inground that is 15x25..It was put in last year and am thinking about installing NG heater..I have a gas line to my bbq and would most likely tee it off then go about 25 feet to the filter system where I would set up heater. Does anyone know total cost approximates...I am in NYC area(Bronx)..any recommendations on equipment..I am very confused on how much the parts or even labor should be..thanks in advance