Hi,
I've seen some interesting small plastic sheds, the Home depo type, just big enogth to fit over the scope. If you add a pad and wheels to the small plastic shed you just wheel it out of the way when you want to observe. It seems like an inexpensive compromise, not much work, not much if any protection from the weather when viewing, but it achieves your goal of not having to lug the dob and set up. This is especially helpful if your dob needs collimation ever time you move it.
Dan
