My grandparents were refused installation due to LOS issues. A local satellite contractor quoted them an arm & a leg for a custom install. Typical scheister trying to take advantage of the elderly. I want to do a self-install (knowledgeable with DirecTV parts but clueless with DishNetwork). What is the minimum dish requirement? Will the 500 dish (for the 110 & 119 birds) suffice? What about multi switches? Thanks for your help!