I think it's likely much easier to split money making and rocketry. For one, when I'm at a launch actually launching is great! If you're looking to sell something, find an area with tons of enthusiasts and sell something they want. Rocketry is a really, really small hobby.
For example, in December we started little Etsy store selling 3d printed accessories for a super popular bird feeder. That bird feeder has probably 10-30x owners in the US than the total people doing rocketry worldwide. Even after a CAD subscription and buying 2 new 3d printers, it looks like we're on track to make more profit in the first year than I made when I started as aerospace engineer at NASA (inflation adjusted, even).
Still, people do love ice cold lemonade & rides to their rockets.
