Tatiana,
Roberto, Nicole, Sonja and all of the others have already said my advice for you. But I will give you my thoughts on the issue at hand.
The very first thing you need to do is buy 4 acres surrounding you. To me, 1 acre isn't enough space for a long-term stand off.
Next is buy stock in a fencing company then buy a 12 ft high fence all around your land. You know, for the zombies! Ha ha ha.But for a prepared readiness situation, fencing is a mandatory item.
Next is look into vertical farming. The subject is a popular topic and there are people in city shapes that produce a lot of vegetables and fruits. A good start would be to get a 20 or 40 ft shipping container the convert it to a vertical garden. Even if the apocalypse doesn't happen, you can easily sell your crops at farmers markets.
Next is to look into sustainable energy production. Best case is solar paired with wind turbine(s). Put solar panels on every south facing rooftops and get tied back on the the grid. You can literally sell power to your local electric company and I'm pretty sure they have to take it, according to the law. Make sure to have a good battery system for when your power goes out.
And lastly, join a co-operative group of like minded people. And if there isn't a group, form one. They are a significant lifeline, apocalypse or not. They become a barter source, friend(s), knowledge source, partners, etc. And if there isn't an apocalypse (most likely), you have a group of like minded people.
Good luck!
Hoppy