You can make about $75000 per year on 2-3 acres. We know people who are doing it and we plan to do some of it as a cottage industry supplemental retirement income. You just have to know what to grow in your area.
You could make $75,000 a year on 3 acres if you take in work, or work in a trade but not thru agriculture alone. An acre of land cannot produce $25,000 worth of wealth that way. The most you can get out of an acre is $1,000/yr thru livesstock and “crop” farming. Now if you grow pot you can live on 3 acres!