Pretty lucky friends you have. I wonder is money in roasting or serving the liquid form? Or are these killer ethiopians worth 20 or 30 a pound?
Harbortownbrewing do you roast individually or together? I havent tried blending much, what is it like?
My perspective is, the money is wherever you can make it. Despite being related, the two businesses are sooooo different:
-Roasting is about sourcing, logistics, manipulating flavors, and selling large volumes. This could all be done in a dusty, chaff filled warehouse.
-On the other hand, brewing/having a cafe is about the customer experience, sourcing coffee from a good roaster, knowing how to brew different beans different ways to the customer's liking, adjusting your espresso game throughout the day, and finding a way to keep a presentable storefront while still making money.
Around here, the roasting is done by dudes with dad bods, while the cafes are staffed by hipsters with flannel shirts, fashionable fauxhawks, and handlebar mustaches. So much contrast in business models all around. Having a trendy cafe, full of light, bursting with people sounds super fun and sexy to me, but at the same time think of all the work that goes into that. The space and furniture has to be kept in good shape, espresso machines and grinders have to work without issue, a rainy day can kill the amount of traffic which comes through and have a big affect on your bottom line, etc. The more I've thought about it, the more I'd like to be on the roasting side.
Anyways, that was a really long, drawn out answer to a question which may have only been hypothetical. It's something I think about a lot though.
Regarding blends, for the most part I roast the origins separately and blend them post-roast. This is important because some beans will crack at different stages, plus I roast Colombians different than Ethiopians, for instance. I love single origin coffee, but I will admit many of the "blends" I've made have been superb.