5G WiFi Mesh Setup

I'm starting a business to provide affordable WiFi for 70 users using my 5G router with unlimited data and 100mbps speed. I need an expert to set up a signal receiver with the WiFi router and use a mesh system for wide coverage in a medium-sized area (multi-floor home).

Requirements:
- Need to setup a signal booster or receiver which can help to increase wifi speed and setup a mesh system.