Back when I built model railroads, it was always very helpful to model the thing at 1" = 1'-0". Working out kinks in cardboard and basswood sure beats doing it in plywood and 2 x 4s!
IMHO balsa has no real use in modeling unless the thing flies. By all means try it if you care to, but I get much better results with basswood. I have a little baby table saw which lets me make the sizes I need, but it's readily available in the back at most hardware stores.
Sands, glues, paints and cuts so much better than balsa.
I just made a mast for my Compass Rose Corvette out of a piece of basswood. My own preference for making round or tapered stuff is to start with square stock, other people start with round.