I'd suggest that this will depend on the number of potential users, what they're prepared to pay and where the nearest decent connectivity is located.
If digging fibre is possible (it rarely is) then that's the ideal solution but normally you'll end up with Wifi connecting customers to a single (preferably) location that has some sort of decent internet connection. The quality of this wifi gear is a factor, but the main one is getting good clear Line of Sight between all your antennae.
In what capacity have you been asked to help? In a similar situation a few years ago I negotiated the provision of antenna sites and found the backhaul connection to the internet but there was no way in hell I was going to deal with billing/support for domestic customers and I got a local WISP to impliment it all.
I didn't make a penny, but I did get a free connection
Local knowlege is the key, and probably the reason the big companies find this all so difficult.