FYI, Thrifty propane will give you a 500 gallon tank if you prebuy 2200 gallons of propane. Prepay price was $1.62 a gallon when I bought. A tad spendy up front but way cheaper in the long run. Ditch the tank rental and stroll with more cash in your pocket. Heat mostly with wood (free other than chainsaw gas and effort) but that should do me for quite awhile.