30 lb bottles of propane might be on the edge of light, especially in the winter. They tend to get icing on the regular vapor presure regulators. I have a costco chinese 3 fuel 9400 (firman), and now have upgraded to a cummins 20Kw unit. Money well spent. The generator was cheaper than the install. The propane setup only cost about 400 for plumbing from the 250 gallon tank with dual stage liquid to gas regulator, and the tank of propane was about 500 to fill ($3.02/gallon). The generator unit can burn up to 15 gallons per hour max, but generally uses about 5=7 gallons per hour with its 60 inch engine. Best of all, I don't even have to lift a finger to make it happen. That time savings really makes the cost worthwhile. Especially for the times when I might not be home, or really don't want to get out of bed.