In my case (very small town), we shared a connection with a local business (feed store) that had a tall structure we could mount a pair of radios on (grain elevator), so we're not really using a "provider".

Sorry to not have better info for you, but hopefully someone else will see this and chime in!

Not the OP, but the people I've seen this do it DIY have all done it with Ubiquiti products. A single link can get a mile of range with clear LoS. Depending on how far out you are, that lets you connect to a "real" internet connection for cheap.

Mikrotik products are very popular among people running WISPs, and their product range reflects this, with a whole range designed specifically for that purpose.

Even their standard wall/ceiling-mount AP is weatherproof and comes with pole mount attachments.