Earlier quoted context omitted.
There's the other big that gardeners (especially home covid gardeners) forget: almost nothing you want to grow on your "coupla acres" has enough calories to sustain you. Potatoes are probably the only exception. Everything else--beans, wheat, corn--is a pain to grow and process, especially at a small scale.
The sweet spot is when you have passions about products, expensive things or impractical crops to scale... We have a homestead with acreage in Hawaii. Chickens and eggs are zero effort. We don't even need to feed them, just collect the eggs. We grow heirloom tomatoes in the greenhouse because they are crazy expensive to ship from the mainland and we love them. Likewise, we also grow a lot of white pineapples because…
I want to emphasize the last bit though about “building an empire”. It depends on what your metric is. You can be rich and be broke. You can be poor but wealthy. The empire here would be in community and not in money. Giving back by selling your produce, locally, and helping the community. That, is satisfaction. On top of the satisfaction you have from growing your own food of course.