Well, she didn't ask
me before buying it
We have a ~2010 F-550 with a V-10 and all I know is that is uses a lot of gas but at least the county is paying for it. It does have 4000# of water on the back, and the pump and the toolboxes full of saws and nozzles and fittings, etc etc etc. Decent enough truck and it is nice to have 500 gallons which means you can squirt for more than five or ten minutes. But brand new it's had issues like the bright lights may or may not work or stay on. Always happens to me and not someone else.
It's actually a state loaned truck, and another VFD in the county blew the transmission out of one just like it at about 300 miles. Apparently they were driving around slow on two track roads or no roads in High Range instead of low range.