Tron -
Well, motorized dishes of any size are an off-center, off-balance masses, moving around making your life hell.
So, a sturdy mount with side-support struts is a requirement ! -

But, I have no doubt we could whip up a simple design for an NPRM that'd hold your SuperDish (even with a motor), using the existing J-pole and struts.
It's that peak-of-the-roof part that I don't much like.
I'll ask Linuxman to chime with his thoughts.
He's got several NPRMs on his roof.