First time posting but I've been following Wander the West for several years. My wife and I are just about to sign a contract for a Hawk Shell. We are very excited and and I could benefit from hearing a bit more about your experiences with the FWC factory installed furnace versus a portable heating unit. Being a bit on the frugal side the install price of $1595 causes me pause? Leaning toward going with the factory furnace but would like to be fully informed about other options. Thanks for your thoughts