Solver - Eric, thank you. I will read the manual roof tool closely.
Flightdeck - KyleDJ, thank you. This might do it but the lower edge might be to low for the doors as things sit right now. I will try this too to see what happens.
LawB10, thank you. Yes, that is the idea. I've downloaded your plan and will take a look.
I can move forward now thanks to all of your suggestions.