You must also check State & County fire regulations. I have a 250G tank, but cannot get a permit for it, the jobber (bulk retailer) won't fill it without seeing a permit. So, it is behind the barn, I fill a 55G barrel in the p/u, and pump it into the tank, a few trips, tho. I like having fuel around should something happen. Like hurricanes, storm damaged utility lines, tshtf, etc.........