I asked this yesterday but didn't get much insight. The documentation and solutions are quite dated for setting up a public WiFi spot with a captive portal. Are there any resources that I am overlooking into how one can build a solution for small business? Setting up the hardware and creating the portal.
We run it for a small busniess off of a refurbished desktop and it works fine for roughly 250 connected users at any given time.
Here's a link to the home page: https://www.untangle.com/ And to the captive portal section of the wiki: https://wiki.untangle.com/index.php/Captive_Portal
Alternatively you could get a router compatible with OpenWRT or Tomato firmware and set up a captive portal on the router itself.