AP2, I don't know how well your set up but I have plastic 55 gal drums at the corners of all my building at least three at each corner, they hook to my gutter system, but instead of just running into the barrels, they run down the tube that I hooked to the gutter, into a 2ft long 12" wide PVC tube that is screened on the top and bottom. Inside of the tube has a layer of peat, a layer of charcoal, another layer peat and charcoal, the last layer is gravel, the I have a flex tube on the end to move from barrel to barrel. barrels can be sealed. Then under ground about 20' from the house I have a 1500 gal black poly water tank with electric pump. Black poly could be used above ground because it does not allow for algae growth, but they can cost a few hundred, according if new or used.