If they are going to charge you an extra few hundred, I would probably call it good and set that aside for several years worth of propane for the furnace.
If they are going to swap it out at no cost, sure. Better to have an extra option than not. It's a good option for spring/fall when it's cool but not bitter cold. Also, you don't typically run afoul of overloaded electrical systems like busy summer weekends.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV