I don't think I'd worry too much about opening a brewery until you can nail the repeatability factor. I think most of us would love to open a brewery, but it's a headache, lots a money, and something like 75% of new breweries fail within the first year. Repeatabilty is tough to accomplish at a homebrew level. With the right equipment it gets easier...but equipment doesn't do everything.
I don't often brew the same batch twice. There are a few family favorites that I do once or twice a year, but Ive been brewing for years now and still can't get them perfectly matched. Close, but not perfect.
It all comes down to nailing your system efficiencies (I'm assuming you've moved to AG if you're concidering owning a brewery) and keeping your temps constant. Take great notes (write down EVERYTHING) and it gets easier. There's a lot more to it than efficiency and temps, but those are the two big ones.
As Cford pointed out though...get a business degree. If you really want to brew...then be a brewer. If you want to own a brewery, I suggest hiring a brewer. Most people can't do both. It's not impossible if you have no family, but it's a lot of work.