How do I set up a WiFi internet gateway similar to retailers or hotels?

I received a TP-Link Omada AC1200 Gigabit Wireless Access Point for Christmas and would like to use it to provide an open WiFi connection for people to use in my area.

I would like to have this network isolated from my existing home networks and have a RPI2 that I would prefer to use for the server but am willing to purchase another router if need be.

What I would like is to have a logon page that anyone wishing to access the internet must load in their browser and agree to "MY" T&C, similar to what many hotels and chain restaurants have.

I have searched for information on this but I am coming up short on specific keywords to narrow down the results. Any help or direction in where to find such information would be greatly appreciated.

Thank You.