We purchased a used MH which had the heat pump option.
Pro's:1. Doesn't require a space heater which takes valuable room to store.
Con's: 1. Our ducted heat pump makes too much noise..same as running the AC, 2. Takes the same amount of power as running the AC, 3. The butane furnace heats the unit up much faster in the morning.
It has a cool feature....on ours you set the thermostat to heat pump and it monitors the outside air temp and if the temp drops to a certain point it will automatically switch from heat pump to the propane furnace and or back to heat pump.
We prefer the electric space heater as it is quieter and that radiant heat blowing on you feels warmer on chilly mornings. When boondocking we plan to use a small catalytic heater.....no power required.
Personal opinion: I would not pay for the heat pump option if I were buying new