First attempt at scratch building.

[Lester Perry]

I have kit bashed and modified but never tried to scratch build a building. I have a Walthers transfer building that I don't like very much I want to replace it and can't find a kit . So here I go. I am looking for suggestions, do's , don't s, warnings , Materials to use . The only thing I am avoiding is metal . I have a few metal kits and don't want to go there again. Leaning toward plastic. Is plastic and wood together a bad idea?
Les