I used to live in the country, 7 miles to the local CO. We used a successful rural WiFi provider, Zetta Broadband. My kids still use them, $55 a month. They started out small and have expanded successfully. They do not use public right of ways. The poles are in the wrong places and there is all the legal mumbo jumbo. Instead they look at the local topography and approach the landowners of the high points. I believe they offer a free local Internet connection in return for siting a tower on their property. As I recall they will have a land line connection to a base station for an area and then hub and spoke repeaters as the demand succeeds.
The other thing they did was to get subscribers to put Zetta Broadband signs at the end of their driveways. You might offer a months free service for the lessor roads. On the main roads you might offer a significant discount. The signs were small 1' x 2' on wire H frame stakes. I know I decided to use Zetta because I saw their signs several times a week as I drove by. I eventually stopped and took down their information.
Caution: getting started is expensive, you probably need at least one commercial base station. You might be able to modify home WiFi units to act as repeaters but you will need some sort of tower or mast, antennas, weather proof enclosures, and possibly trenching from the house to the tower for power at least. Home WiFi units are a short term solution at best.
Customers also need an out-door directional POE WiFi unit. As I recall, Zetta charges $130- $150 to install it including the unit and they require a Zetta install. The one trick I saw was using a telescoping pole with a WiFi unit on it so they could measure the power and direction to choose the antenna location on the house.
You might start small with a collective. Find 5 - 10 neighbors who would be willing to buy the directional WiFi unit and pay you a monthly fee. Make sure these people's property makes sense in terms of line of site. The telescoping pole might be a good demo to convince people to chip in. Put the pole up and watch a NetFlix video on your laptop.
To get a fiber drop to your house check with the regulatory agencies if they have starter or seed programs. I know there is money collected for rural Internet. Figure out how to tap into it on a small scale.
Go full bore on this. There is a real need for rural Internet. Satellite and dial-up suck and if you are in the country DSL is not even a distant thought. If you are successful getting started word of mouth will spread.