I wouldn’t give alcohol on regular basis or leave alcohol for people to use. If I get nice guests and we engage in a conversation i might offer them beer or wine as if they were really my guests, but thats hospitality. A host I stayed with one time told me she kept this wine rack in the kitchen and some guests (husband and wife) drank all 8 bottles one night. 8 bottles!!! I’d probably die if I had that much!
What if you get someone really drunk and they puke over your furniture or they fall down the stairs? Too many potential problems. What if you get an alcoholic and they become obnoxious?
The thing with charging for yogurts and stuff is that some people - like me - provide a few breakfast items for free. Just increase the price by a few dollars.
I, as a guest, wouldn’t want to eat my hosts’ yogurt and pay for it. Fresh baked goods, aroma wafting through the house, well, that’s another story. If your goal is to increase revenue offer a proper breakfast, omletes, juices, sausages, fruit etc that you actually cook. Or put TVs in every room and make the place more upscale. Or offer an experience.