Another reason is you have that nice new F350 that you guys drive and the Mercedes luxury wonder car.
Now you're planning on driving all day in a clapped out panel van with minimal comfort features?
Dude, your wife is going to say "F___ you Kayteg, I'm not riding in that cross between an appliance delivery van and a hippy mobile!"
Honestly though, you're taking a huge step back in comfort. Not like you're going to be commuting around town in it.
Still a fun project and to each their own, we all have our own preferences and hobbies, but a newer $10k truck camper and a few $ more in fuel and you'll have a much nicer all around rig.