How large is your small business? How many guests do you expect to be online at once on your public WiFi?
It's not my business. A friend is in the process of establishing a walk-in medical clinic (just signed the lease and contractors have started the internal construction). We had lunch together a couple of days ago and were discussing all the multitude of details she has to take care of. I do have some experience with building contractors, so she wanted my opinion/advice on some suggestions from her contractors. Somewhere in that discussion she mentioned that she planned to provide WIFI access for folks sitting in the waiting room. I got to thinking about that later, and how businesses do that, which prompted my query here.
As for the size of her clinic, all I know is the building has about 1800 sq ft which will be divided up into a front waiting area, several patient treatment rooms, office, storage/records, etc. She has an initial budget based on treating an average of 40(?) patients per day, but I'm sure she hopes that will grow. As for technology, she plans to have a couple of PCs (one of which I assume will be a server) and a couple of tablets running some medical-practice software package.
Just from thinking more about this as I type, I have to wonder about the advisability of allowing any kind of public access to the network in a setting like that...