I have a 20KW propane Generac at home, an 18KW natural gas Generac, and a 75KW natural gas Cummins at work. And then I have a dual fuel Honda EU2000i, a dual fuel Honda EU2200i, and an OLD gasoline HF 8KW with a Honda engine.
The large generators are awesome for short outages. We have had medical staff on hand at home that had no idea the power was out. The problem is that they use A LOT of fuel. Our 20KW would burn more fuel in 24 hours than AR-Jedi used in his entire 12 days without power in his dual generator approach. We have had enough natural gas shortages in our area that this causes me concern when running the office at work on generator power. So that is one of the good and bad sides of running propane. You are responsible for your fuel supply but you are responsible for your fuel supply...... I have a 1K propane tank full. It is between $2,000 and $3,200 worth of fuel depending on the price of propane at the time. On the 20KW it would last between two and three weeks. That is about $150.00 per day in fuel. We have had outages that lasted two weeks in this area. We keep the smaller generators around to extend the fuel and to allow multiple types of fuel. If propane is hard to get then we can run gas.