Family farms sell work shares to friends and neighbors...the friend or neighbor gets a share of the produce for working so many hours per week/month, etc.
They also sell community shares—people who want to be guaranteed a share of food but cannot work contribute so much per month and receive baskets weekly, monthly, etc..provides cash flow :)
Automation of the planting phase, means one family can plant far more acres than they can harvest, based on the crop. If true, that only 20% of farms can earn a full living, than perhaps planting automation has made the family farm obsolete, and owners cannot share the harvest phase. Hence the incentive for foreign labor.
But that is just a distortion of the market. Build a solid border wall to protect the other folks in society. Ban guest workers, because living in a bus is anti-family.
Then what changes is like the free stock market, shares or contracts would be sold to give harvesters more ownership.
When harvesting is also automated for other crops like fruit picking, only then can one owner farmer responsibly manage the entire farm process.
But currently, mega planting, without mega harvesting, has a very detrimental impact on the rest of society.