Hi,
I'll be pleased to complete this project for you. Let me introduce myself: I'm a CCIE (R&S) certified network and systems specialist with 7+ years of experience in developing, configuring, securing and maintaining complex WiFi Hotspot networks for large enterprises.
The technical name of your requirement is "Captive Portal Hotspot". I have implemented many captive portal hotspot systems for Ubiquiti, Mikrotik, OpenWRT (Coovachilli), and Aruba based WiFi networks. My customers include McDonald's and Sephora. I can share samples of my work in the form of pictures, videos and web based demos.
Here are some successful captive portal hotspot projects that I've completed on Freelancer.com:
https://www.freelancer.com/projects/graphic-design/Develop-wifi-captive-portal-for/?w=f
https://www.freelancer.com/projects/php/Setting-Captive-Portal-based-openwrt/?w=f
https://www.freelancer.com/projects/php/Internet-Hotspot-Unifi-Router/?w=f
https://www.freelancer.com/projects/php/Unifi-Custom-Portal-with-Email/?w=f
https://www.freelancer.com/projects/graphic-design/Social-media-integration-wifi-captive/?w=f
https://www.freelancer.com/projects/graphic-design/create-customizable-Wifi-landing-page/?w=f
The price is negotiable based on detailed project requirements. Please send me a message so that we may discuss this further.