3a) Depending on where you live, finding an installer could be difficult. Like finding any contractor, there are plenty of idiots that have no clue what they are really doing as well. Of course they will tell you they can do it with no problem - get references!
Hope that helps.
This might be might lucky day because I see you're in South Georgia. I live in Savannah. Are you close enough to Savannah to be interested in doing this?
