Great question, BTW.
I also wanted to add that I would be deluding you all if I said "lots" of money is to be made in related products and services (I just said "more" could be made than in selling labor-intensive cookies). I don't think it's easy to make "lots" of money in cookies no matter what you do - especially now that more and more people are selling classes and products. (Though I suppose "lots" means different things to different people.) I work like a dog, countless hours every week doing multiple things, that, when all cobbled together, earn me a decent amount, but not even close to what I earned in past business jobs. But, I get more joy out of what I do now, and there is a second higher-earning contributor to our household, so that's how my model works for me.