I've got a 5600w Craftsman, that works OK and does the house good. I'm not too impressed with it's appetite for gas though. It's a few years old, has a 10hp B&S motor. I've been thinking to maybe start looking for a diesel to replace it with. But I've got a couple of propane tanks here for the BBQ too. So the first question is, for anyone who's got one - how long would a 20lb propane tank last on a generator of about this size? Second question is - could the 10hp B&S be (relatively easily) converted to propane? I don't use this thing much - didn't get used at all last winter & not yet this winter. I'm not complaining about that though.