Make a humidor to have fun and see how it sells. That'll give you a feel for the market pretty quick.
It sounds like that may be the best advice. I do have to be careful with projects that I do for fun though because it takes away from the time I have for projects that make money. But heck, a couple of boxes should be easy enough. It's just the details that kills ya.

I'm thinking of making a humidor where the top of the box looks like the back of a guitar with bookmatched indian rosewood and an inlay stripe down the middle. Or maybe a humidor where the top looks like a guitar top! Complete with a glass covered sound hole viewing port and a fretboard.

It might be fun.

Thanks guys

Greg