To my knowledge, none of these workers have done as you describe. Such people would be extremely visible out here. I do know of a large family dairy and livestock operation that employs legal husband and wife teams. Usually, the women work in lighter areas of the operation. The kids spend the summers at home with relatives. None of them have stayed, AFAIK. Again, this is a sparsely populated area that is 99.8% white, maybe 3/4 of the people here are generational residents who are intricately intermarried and interrelated. Everyone knows everyone’s business. This legal green card worker program has been extant for over 20 years, here.
There is a large Hmong population in the nearest city of ~50k. A few have farms, but they are not organic, are strictly family operations and are known to be resellers of produce from other areas, along with their own.
There is a Hmong underclass and Hmong gang problems. There are also many Hmong lawyers and medical personnel. They are entrepreneurial and tend to stick to their own, rather than work for others (even the criminal elements). I have never heard of an Asian farm worker who isn’t working within their own extended family. Also, I have known some local Americans who married Thai wives 50 years ago, but moved away, as the wives preferred suburban life in places with more Thais. One man lamented to us that his Thai wife was insufficiently entrepreneurial. In his opinion, the Vietnamese women were the go-getters.
With all due respect this is your personal experience and will be a disaster on a large scale with the US farming business.
DO NOT IGNORE that history shows us that guest workers put down roots. Not all of course but you really think Mexican guest workers will return home when you tell them they are legally bound too? Not when there is a huge Mexican community here to melt into and migrate to nicer ___cash only___no tax paying____ non-farming jobs in construction, hotels etc etc etc.
NOT WHEN we have a huge welfare state that provides incentives to pop out anchor babies (new US citizens)
Your “temporary guest workers” will be lawless like the illegal aliens we are stuck with now.... OK they will be slightly more law abiding and some will return back to Mexico when their labor contract is up. Doing this for a few seasons while they learn how to stay here for good w mamacita and their US born children