The house is a double-wide trailer located in SW Montana. Probably has the standard 500 gal tank which I realize could not hold more than 400 gal. The homeowner probably received at least one delivery of propane this year before his death the last week of July. Current fuel level is unknown but presume it to be no more than 50-60%. The home is now temporarily abandoned with the electric still on and the furnace set at 55 F. Hopefully the water heater was turned off. Questions: given normal weather how long would you expect the propane to last for heating the home before the supply runs out? Would you guess that 55 F is enough to keep the pipes from freezing? Just looking for opinions really. This property is not my responsibility but other family members are. They are just young kids who have never had to deal with anything like this before. Thanks for any assistance.