Before somebody starts buying land, livestock or equipment, I want to know what they expect the place to do. Are you raising some of your own food? Trying to leave town? Building toward a different income? Those are not the same project.
I am not against lofty goals. Aim high. But the first system has to fit your present skills, time, money and available help. If the first attempt is too large, every ordinary problem becomes expensive.
Starting small does not lower the destination. It lowers the price of learning.
Set the first limit before the first purchase
Decide how many hours the system gets during a bad week, not an ideal one. Decide how much money can be tied up without threatening the household. Decide who covers the work if you are sick, traveling or earning the income somewhere else.
Then build the smallest version that produces something useful. A few hens can replace eggs. A raised bed can teach planting, weeds and timing. One secure paddock can teach livestock care better than buying animals for acreage you cannot yet contain.
Expansion should be earned
Run the smaller system through weather, predators, harvest, storage and the season when your enthusiasm is lower. If it works, expansion is a calculation. If it fails, the lesson is still affordable.