n2 Im with you here that EFS is fuggin expensive but I cant judge on the quality because I havnt bought enough stuff to make a comparison, so maybe it is worth it. If you live near fields or a quiet road make you could always go down to a beer brewing company and explain the reason and I bet they would give you an empty old keg that they didnt use, you could fill it with water and/or sand and the uses would be endless, the same if you got an old tractor tire from a farmer, but these both would take up space which is why i suggested outdoor use.