You can try Three 4G speeds at the location, preferably inside, using a £1 SIM from a newsagent in your phone, (assuming a 4G-capable phone), plus a minimum topup. See mine in my sig.
Latency is very variable, which wouldn't suit gamers, but mine isn't very noticeable on ordinary browsing. Streaming works fine.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - Three 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up.
If you never think of anything off the wall, you'll never think of anything original.