Can a HD capable DirecTV dish be installed on a garden shed?

I currently have an all SD setup -- R15 DVR, D12-100, and D12-300 with a pole mounted 18" round dish.  I want to upgrade to HD-DVR, at least one HD receiver, and the whole-house DVR so I need a new dish.


The dish/pole is near a pre-built garden shed I recent added to my property.  The dish is at most 5 feet from the shed end doors through which my lawn tractor and similar power equipment will enter/exit the shed.  I'm worried that "I" might damage the dish/pole (or knock out of alignment) by carelessly running into it with the lawn tractor.


Since I need a new dish and a ounce of prevention is worth a pound of cure, I want to relocate the dish to the shed.  It's a garden shed with 2x4 on 16" center stud walls, vinyl siding, and asphault shingle roof. Its built on 4x4 PT skids and sits on cinder blocks. 

Any reason I cannot have the dish mounted to the shed?