I think everyone should pay close attention to the posts by NuggetHoarder, Susan, and Eugene. These represent cold, hard, practical reality.

It does indeed take years to develop a productive mini-farm, and a lot of hard work. Don't expect to sit around playing video games while your land magically feeds you and heats your house. If you don't get your butt in gear and get the work done, it won't get done. Your hobbies and interests had better be connected to the work, or the whole enterprise will fail. The gardener's shadow is the best fertilizer.

Developing and feeding fertile, productive soil is half the job of gardening. Soil is an ecosystem. I probably have 10,000 square feet in active production (garden and orchard). That's roughly 1/4 acre. It takes at least 4-6 times that much lawn and light bush to produce the clippings and leaves to keep the soil fed. Areas with longer growing seasons have the luxury of planting winter cover such as ryegrass as green manure. Otherwise, it's necessary to rotate crops (which is often necessary for pest control anyway). You also need to adjust your soil-feeding to compensate for high or low pH as well as nutrients (for example, in my naturally high pH soil, I have to limit nitrogen and biochar in areas where I'm planting potatoes; otherwise the flea beetles and nematodes will ruin my crop).

The long and short of it: there is no substitute for putting a spade in the ground. You need to know your soil. Hypothetical plans only produce hypothetical food.