Trying to find more hobbies other than lifting: but obviously the real question is how do I monetize a hobby?

I've been looking through TRP for relevant career options but otherwise I would like to have a small business or something on the side - I have an idea for a fitness gadget that could work.. but it's also extremely costly to make, of which I do not have.

I totally understand the logistics of how vague I'm being and how bitch-like this may seem; but I'm actually quite shallow in terms of hobbies. I used to do Jujitsu, I'm the President of a Society (Gaming) and I work in the gym and I work out a lot more than I used to: But other than that I don't really feel any passion towards anything else.

I'm looking to the men, and, if possible, someone to create a few related threads in getting steps towards monetizing something so that I can increase my own value over the next few years.

Thanks.