Ah, you are in a pickle, aren't you? Since you don't want to move (can't blame you there), and have 300 acres to work with, have you thought about starting your own business?
As you are well aware, 300 acres takes a lot of horsepower to be cultivated, and you must have the knowledge to keep things growing. All that land, girl, I'm drooling with envy. I know what I'd do but then you are not me. I don't have a degree of agriculture so I don't have the knowledge to work the land like you do. I've seen those with independent streaks start out on their own and create a nice little income for themselves. I've seen goats put to work and used to supply meat and milk for people who like that particular product. I've seen a self sustaining farm run on solar power become a local success. I've seen a gal turn her herd of grass fed beef into a money maker for her. A few have gone on to teach at local college.
They all had one thing in common: a degree in agriculture. They started at the bottom and worked incredibly hard to reach their goals. Some folks think education is a waste of money. My reply is that nobody can take an education away from you. You can lose your house. You can lose your car. You can lose your land. But the knowledge in your brain is exclusively yours. Nobody can take your knowledge away from you.
Keep learning all you can about the field you want to be in, and always ask yourself: WHAT DO YOU WANT TO DO?