I bought a complete truck for the axles and drivetrain, and there are more performance parts becoming available since the engine is basically the same as the raptor 6.2L.
I don't remember the price of propane at the pump off the top of my head. When your rig has a 2.5L engine, with under a 100hp, it doesn't use much fuel. I don't fill up all that often. Also, I haven't been doing much recreational wheeling this summer, just comps. I think I burn more fuel up when I'm just wheeling for fun, rather than competing.
I don't think that's the steering pump in the Northern catalog. I'm pretty sure that mine had 2 spool valves with 2 solenoids right next to one another. It was set up for a dual action hydraulic cylinder.