We rely primarily on my day job as we're only in year 3 of running a 1 acre permaculture farm in a peri-urban area, with 3 kids at home with us. This means time is still hard to come by, but I can see that we'll be able to support ourselves with only on-farm income if we want to, in about 2 years. This is also because we're saving most of my income as although we don't make much money on the farm, we also don't have many expenses anymore.
A year ago, we added a 1 acre neighbouring plot, which we run as a nursery. At the nursery, we sell very hardy plants, and cover the salaries of the 2 people it employs (we don't make any money yet, and don't cover taxes on that property).
The nursery: It's not a success in the sense that it's not making us any money, but it's a success in the sense that we were able to preserve 2 jobs during a catastrophic drought in our area, and these 2 people have incredible plant knowledge of this particular climate (which I'm finding very particular- even 10km away the climate grows different stuff), which they're sharing with me. It's also been a success because the many years of junk on that property has been useful for building fencing on our 1 acre, allowing us to gradually set up pastures without buying new wire/posts. Suddenly we also had a ready source of companion plants, which accelerated the progress of our food forest by at least a couple of years. We also got access to a around 10 bags of horse manure every week, which saves me a lot of time. And I now know how to propagate a lot of different plants, and have a newfound appreciation for non-edibles.
Our farm: On our 1 acre, we occasionally sell ducks and chickens (enough to cover feed costs).
Because we have slightly better wellpoint water and I now know how to propagate, I sell softer plants out of my house-- I track demand closely and focus on just a few plants because I still have a day-job: right now those are moringa, grandailla/guavadillas and tamarillos. I use this money to pay for our nursery staff member to have 1 more day's work every week, on our property-- which helps with my exhaustion and takes off some of the pressure of manual labour but again, it is not extra money. Selling these plants has allowed me to get to know many people trying to grow edibles, and also connected me to the permaculture growers in the area. That said, these cash crops-- particularly moringa-- could be pretty successful if I had more time!
We're also planting some of the hardy stock from our nursery into several small non-irrigated rotational pastures of forage for small dairy goats, which we hope to get next year. It'll be a while before those goats break even, but we hope to sell some goat cheese, and once the goats are on the farm I think we can honestly say we're using our space fully/to the max (it would be too long before we would have the time to really farm the full acre with something more time-intensive like tunnels-- and selling vegetables in our area at a larger scale is not lucrative).
We run a small monthly coop where we buy directly from farmers and small businesses and supply food to order (with a small markup) to around 30 families. Again, we don't make a huge amount of money doing this this-- but we cover our own off-farm food (grains, nuts, oil, dairy), and have a grateful and friendly network through which to directly supply our own produce when we start to have enough-- right now we just sell fresh herbs/herb plants & sometimes duck eggs, but we're starting to grow an excess of certain fruits, and in a couple of years we'll have a lot (hopefully!).
The goal is to sell enough/make just enough money to demonstrate that we're using our land effectively and being good stewards, not necessarily for it to be a financially viable operation for anyone. i.e. it's financially viable for us because we've spent years on this journey and have gone really gradually, and have paid for the land (both acres) and built our home with off-farm income. It's viable in the sense that we don't have a large income and we've been pretty frugal- and so anyone in our peer group would be well-poised to do similar if they wanted to-- i.e. I desperately want to show it's a viable and appropriate/sustainable option for the middle class. It's not viable in the sense that NGOs and policy makers in South Africa sometimes want everyone who is poor to take up urban agriculture, which is a generally fraught idea because the only thing that is keeping us going is having financial margin to fail occasionally. Since we're in an urban space, the problem is not the market for our products, but that the cost of land and cost of living is high, yet minimum wage is very low and most food is produced on a cheaper land by paying people minimum wage (ignoring the costs to the land and fossil fuels). So there's a mismatch. We cannot set our prices that give us the type of wage that would provide a good living for the work we do, because this cost would be so much higher than the minimum wage. So we meet in the middle and consider the learning and good food as the primary reward.