One 20 pound bottle use to last 9 days when were running everything propane. That is fridge, water heater, and furnace on overnight with 10 above celsius nights . We now camp a little different and get a couple weeks and normally switch the water heater to electric after our showers and sometimes just leave it off till next morning, as water stays hot enough all day for the few dishes to wash. The furnace we also leave off over night and if it's quite chilly in morn turn on the furnace to take the bite out and also use the fireplace afterwards in the morn. Now if I throw you a guess as to how long a fridge would operate on a 20lb bottle alone would be an easy month, remember this is just a guess however..
2012 ST25RB SunSet Trail - RESERVE
Silverado LT Z71