I'll be right there with you at Expo West sizing up the various options. I'm 6'3 and looking to fit myself and partner in crime, not sure if we'll both fit. I'm also interested in the Alucab because it allows load boards on top and I want to load 12-14 foot SUP boards on top. It's ambitious, but if we can do that and mount our Batwing awning and other equipment to the FrontRunner Slimline II rack and tent, we'd be golden. I'm in a similar situation as you: I'm tall and wide, and I don't want to tow anything, and getting a Sprinter is not in the budget, as much as I want one.
IKamper sounds interesting, but if I can't put things on top it's not as useful. We camp, but also like to bring things with us to play in the water (SUP, Kayaks, ski gear for winter camping in the Tahoe Sierras, etc.)
Maybe I'll see you at Expo West
@NORDNDED