If u can get the garage space then i would go that way, u can get different size tanks to save space in there, but i think your dad might want 2 be more concerned about the water use (if your on a meter) - If u go the van way, it will take up more room in there and in the winter u will need some sort of heater to keep the membrane above 1c. As nick said above 4040 is the best way, as this will make water quicker without a reel need 4 a booster pump