Goats are super 'destructive' because they will eat just about anything, if they feel they aren't getting proper nutrition they will girdle your trees by eating the bark off of them, so if you want to keep the trees, you will need wire for wrapping, if you are wanting to lose the trees, then not a big deal. Just make sure you learn a ton about each animal you are going to rear so that you can improvise and meet all of their food requirements, if you got that and water, along with a mineral supplement, you will pretty much never have sick animals. But I would make sure to have more food than your animals can possibly eat, it's so much easier that way. It has been one of my biggest challenges here on our farm coming up with enough forage for our cows without destroying the pastures. Goats are easier, but the principle remains the same, have more than enough so that they can easily satisfy their food requirements and modulate their own nutrition. They know what they need to be healthy and if the variety is available to them, they will keep their health in balance. I also highly recommend you get in to permaculture and learn to raise perennial food plants for you and your animals so that you are more efficient. Strawberries, berries in general and perennial veggies like jerusalem artichoke, hablitzia tamnoides (scandinavian spinach) produce tons of food, even in marginal soil and come back each year, what more could you want?
Also, start planting fruit and nut trees as early as possible, the sooner you do it, the sooner you'll be harvesting, buy good stock, not from undedicated businesses.
Plant lots of legumes, they are wonderful and will add a lot to your soil. If you plant edible legumes, like peas, beans, or for your animals, clovers, alfalfa's, all the better.
Good luck, it will change who you are and be an incredible learning and growth opportunity. I'd keep a journal even though you are not going to feel like it after a day's work, lol!