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
With all due respect, I am told (anecdotal) that life in Mexico for many of these workers is suitable for them. They do not like our winters and they do not want to live in an American city.