I live in South Carolina and have a 2000sqft house wirh 2 apollo hydro heat systems model cbc 8, My hot water heater was a Bradford White 75 Gallon, 75,000 btu lp gas. My hot water heater just busted and was wandering if I can buy a smaller wter heater say maybe a 50 gallon tank. Because the price of a 75 gallon is at least $1000. What would you suggest I buy. Thanks