Potentially looking this week to build and deposit for a 21C --- just visited with Lance in Utah and he was fantastic in explaining and answering my many questions about what works and doesn't -- the why buy was answered by this forum as well as my actual visit with Lance and Lucy-- the quality and features sold me... I am a DYI person and pretty resourceful as well as one to look at spending the least amount of money on a feature i could install or purchase on my own vs having them installed by ETI -- course some things I can't so looking for ideas perhaps i could add after purchase.... IE... probably start out with manual cranking the tongue and maybe add later an auto lift .... so i look forward to feedback .... I see also using in snow (ski resorts) from time to time-- will be adding the spray foam and will be off grid-- aware of freezing .... but not too concerned-- have dealt with low teens-- any thoughts... I will add inverter later as well as solar as a portable... like i have currently mounted on a bumper attachment... -- am a little disappointed in the pricing CDN vs USD and will voice my feedback to ETI ...