I really like Goldshaw Farm[1]. He does yearly breakdowns how is farm performed and the reality is he could not live at all if that was his only income stream.
And I think his scale is most realistic what a developer could achieve when he quit and just wanted to try to farm.
Goldshaw is very informative, but I think he is a bit more of a hobby farmer than a real homesteader. If you have a sophisticated system (and are willing to work hard), you can bring in substantial amounts of money on small acreage.
YouTube pays his bills mostly, not the farm.
[1] https://www.youtube.com/watch?v=lD4VW0lLYjE