Everything here is my opinion. I do not speak for your employer.
Preliminary wi-fi access point testing results: $30 Edimax wi-fi repeater has surprisingly excellent performance yet is surprisingly non-fiddly.
Ubiquiti devices have unsurprisingly excellent performance and are unsurprisingly fiddly.
Try my project! Tailscale: a new, magically easy mesh VPN based on WireGuard.