Again thanks for the response Iceberg, and additionaly to Anole for good advise. I plan to get just enough equipment to start with, to see how it goes, and not waste much money.
I found a 33" dish with a mount on it at a yard sale. It also has a universal LNB, with two outputs. I have to mount the dish on the roof, due to very small setbacks here where we live. The roof has a very slight pitch, with roll roofing, so it may be a bear to get the short mast level and plumb. Also I may want a motor, but according to what I've read, the motor is hard to set up,so that will come later as I'm sure I'll have enough trouble as it stands.
As far as the switch goes, the placement will just have to be a compromise because of cabling. The easy way would be to streach the cables across the roof to the downlead, but I doubt if that would be a good idea for anything other than a trial . We live near Phoenix, and it gets pretty hot here, even though I have the roof painted with white rubber paint, which really helps. I would have long runs around under the eaves for sure, but that may be the best way to go. Some cable will have to lay on the roof just to get to the eave.
So thanks again for the switch help because I didn't realize that I needed an extra input for the LNB. Also I should get one that's powered for long runs. Now I'll shop some and see what it takes. Right now, the Viewsat Pro looks like a good receiver, so that will go on the list. Thanks again, Uncleharvy.