Dongle Solution for Community Meeting Room?

Hello

We are a small charity group of volunteers who have rescued an old building in the village and turned it into a community hub. We hope to attract local groups and businesses to our meeting space but recognise that we need to provide wifi facilities. Problem there is that there is no phone line into the building and to get one would mean digging up the road.

We are looking at a mobile wifi solution which would seem to offer the access we require (but with a 10 device restriction) and at a decent annual cost.

See

https://www.pcworld.co.uk/gbuk/phones-broadband-and-sat-nav/broadband/mobile-broadband/4gee-mini-pay-as-you-go-mobile-wifi-10148773-pdt.html

The meeting space can accommodate up to 18 people so we need to think whether or not the 10 device limit will be a problem. We need also to think about the issue of folk in meetings using the facility for downloading large files. This may not be a problem as we think the facility will be used for smaller local groups but just thought it worth asking.

Can anybody spot a potential problem with the EE approach?

Other than the EE solution mentioned above, has anybody any alternative suggestions?

I ask this as it is likely that there are other groups such as ours facing the same issue and who would benefit from some advice.