A lot of farms where I live, in a developed country, are exactly this kind of mix.

Some cattle for dairy, meat and market. Some crops. And often some woodland for tax or grant reasons or under forestry contracts. Maybe some chickens or pigs or similar - usually for local markets.

It’s actually quite neat: I can easily obtain actually free range eggs at relatively low cost, produced within a few kilometers of where I live (a city). Same for pork products, etc.

that might be gone but in my experience - and I live on a farm in the developed world - while some tasks are handled by professionals on serious operations, its pretty common for farmers to do a bit of their own welding, a bit of their own plumbing, treat their own animals, etc, and only bring in professionals for big jobs. Its still very much a family affair even if a farm is only focused on one crop.

Depends on what you farm. But if you have pasture, then you are all of those things. You need to make sure that the land is growing something edible at the right time, it needs to be drained.

All of that requires big machinery, and that breaks or is expensive. So it needs fixing. specialist fixers are there for expensive things, like combine harvesters. but for unfucking a plough or much spreader, thats a you problem.

Look up “Just a few acres farm” on YouTube. Pete, a retired architect, has done all of the above and documented it on his YouTube channel. Heck, add aerial drone videographer and video editor to the list. He makes some excellent videos while cutting hay!

He also has a lot of really practical videos on the business of small farming. He’s very adamant about not going into debt before you start, doing market research in your area, and starting very small but rolling over the proceeds from your first sales back into the farm.

I don't know how common this is in row crops, but it's exceptionally common in cattle ranching. The majority of cattle producers ("cow-calf" operations, the ones who raise cattle from birth to about half-grown) are smaller operations. They're absolutely jacks-of-all-trades.

Common.

Plenty of farmers (who are super savvy) have embraced social media, and are showing not telling what they do.