Comment Mikrotik a possible choice? (Score 4, Interesting) 178
Even though they're suspected GPL offenders (opinions differ) I still have to put in my word for mikrotik.
These guys know how to build wifi in rural areas with plenty of subscribers, stable hardware and good software at low cost.
Even their cheaper products are very well up to the task and can be expanded upon with different wireless-transmitters and antennas.
If that is not enough you can always look at their more "enterprise:ish" products. I've only good things to say about them, and we used their products for well over 5 years when we still ran a WISP.