I should go on and write a book

I keep seeing books that younger people than me have been writing on how to make stuff. Why couldn't I do that? I just had an idea for a book this weekend that I think would be do-able and practical for a whole segment of society. Furniture for college students to build, with few power tools. Maybe just a drill.

If I put together a book of projects and it gets rejected, it's no different from all the craft classes I tried to teach, except that this time, I won't have invested huge amounts of money on supplies for the classes. Just enough to make prototypes, and if it doesn't get published, it's okay. But what if it does? One book published could lead to more, and with a couple, I could make some tidy extra cash. I'm not dreaming that it could make me a millionaire or anything, but what could it hurt to request submission information from a publisher, anyway? Nothing to lose, everything to gain.