You might want to start with a few bags of grains and stuff, and sell them from your home for a bit. There could be a lot more homebrewers around than you know - or there could be very little interest. This is just a way to gauge the market while you look for a place to put a shop That's just my opinion though, and I tend to be overly cautious with my money.
Doing it from home sounds like an excellent idea, and definitely prudent enough for my wife to pet me give it a shot. I am pretty sure that there's a big market for learning how to homebrew, and perhaps the best way to start would be with Tupperware-style parties where I invite a bunch of people over to brew and sample te stuf I've made, and if they decide they like it, awesome, here's a kit ready to go!
Re: cheese and wine making, the thing is, here, everywhere you go you can find EXCELLENT wine and cheese for bargain prices, it would be like opening up a bottled water supply shop in the US (even water might not work, I don't have good water through the pipes so I brew with evian. It's about the same price here as sam's club is in the US)
Sorry or any typos etc, I typed this on my iPhone and there's a bug that doesn't let you see what you're typing. Sheiciitbcucheh!