If you look closely at the pictures it does appear that all the water stuff (tank, heater, pump, etc.) is at the far passenger side rear of the coach. Just look at this pic from lazydays with the panel removed, you can see the water tank right there.
Haven't found where the genny is, however, as none of the pics show an exhaust pipe from it.
However, this pic from the passenger side does show a hatch at the back that looks very similar to the hatch covering our generator on the driver's side.
Note that you can also see the water heater back there.
Furnace appears to be below or next to the fridge (which appears to be a compressor fridge based on the fact that there is no external venting).
Fuel fill seems to be at the very back: