4 season gardens, stocked fish ponds, small inventory of livestock for personal level of sustainable food production, feed crops for the livestock. Add orchards an wood lots for firewood and extra food....etc.
A friend of mine has such on about 40 acres.
She gives away a lot of food to friends an neighbors. Produces bumper crops each year due proper planning an simple irrigation plans that are beneficial to property, plants, ponds an critters.
Lots of work for even her small farm. But her wise use of her property is educationally impressive.
the only problem I see with gardens is this insane heat I’ve seen the last 4 out of 5 years. If you water and take care of it, but you get mid to high 90s every damn day plus humidity and no rain, even with watering you will get crushed
If someone had an oil well on their property they could figure out how to build a small steel in a garage or something to refine a small amount of gasoline (if we head into a Mad Max world)