What everyone else has said. Very good advice. I would add...
Keep in mind your work commute, or how far it is to go to the store. Do you have a vehicle that can make the trip in the winter? (You didn't say where you are located. You can add your general location to your profile, and that can help people give more appropriate advice.) If you are really remote, how do you deal with the power going out? It will at some point; have a plan for getting water or heat if necessary for your animals.
One thing to think about, and I don't mean to sound like you can't or won't succeed. If something changes and you have to move, how saleable is your home/land? When we moved out to our "heaven on earth," we had some very lean years, money-wise. If we had had to move, it could have taken years to sell our home. Houses on this road often sit vacant for 1-2 years before they sell. It is very much a niche market. More than one neighbor has had to take a bath when they sold, or lost the house to foreclosure.
I'm glad you're thinking and planning. Good luck!