I don't think there's any such thing as get rich quick. Several of us have mentioned that even with a reputable sales company, there's still a lot of work involved if you want to make the big bucks. As they say, the only place where success comes before work is in the dictionary.

Has your dad ever thought about marketing kits and/or instructions for how to build dulcimers? Could be a way for a little extry income without having to build the whole instrument.

What does your mother want to do? She could work with him, or do her own thing.