185 hours isn't very much. If you look at the VAST majority of emergency generators at municipal buildings, etc., they are propane. Why? Propane doesn't go bad sitting in a tank. No algae, won't gel in the cold, etc. What size propane tank in the potential new rig? That's one of the reasons I opted for the Prism - it has an 80# on board LPG tank. That's almost 15 gallons of usable propane. At 6/10 gallon per hour at 1/2 load, that's 25 hours run time on a full tank. If you're worried about refilling it, just add an Extend-a-stay, then you can connect another tank, be it a 20# or a 100#er. Propane vaporizes to -40 degrees, gasoline to -73, diesel will gel at about +10 degrees. ST