My advice is DON'T BUILD ON THE POWER COMPANY'S RIGHT OF WAY unless you are going to keep the trees down to their satisfaction. I live on a hill side near town and have a well built dog pen with trees near the fence. On the last two occasions after they've left, I found damage to the fence consistent with a limb having fallen on it. Once it was half-donkey repaired in a way I'd never have fixed it. The other time, I discovered a bent horizontal conduit several months after they'd left. Neither time could I find a rotten limb that was placed there by the wind. On one occasion they parked the bucket truck on the drain field of my septic tank.
On the other side of the house is a very steep hill. When we moved here it was all grown up and I considered it to be woods. Then, they cut down twenty or more ft. tall trees beneath the line and left them where they fell. The old lady next door gave me bricks about the mess and it took my son and myself many years to work it out of the way. Last year they came back and cut limbs and saplings, chipping a few, putting some into the woods, and blocking a road that I'd cleared with others.
The farm is another nightmare. My pastures are severely overgrown and the crews almost always drop limbs on the fences often causing me to have to round up cows and repair fence in the hottest kind of weather.
Being 69 years old, I'm divesting myself of cows and wish there wasn't a single power line near my fences or within reach of any of my trees that might fall on them.
If you're willing and able to keep the right of way mowed for the rest of your life things might go well. Good luck.