I was approached by somebody who wants to set up a regional center regulated and monitored by US Immigration Service &SEC.

I live in California where the Democrat policies have been in full force for 60 years, with massive government funded programs that give our tax dollars to pedophiles, ex cons, drug addicts and alocoholics under the guise of disability, free educations and priority to illegal immigrants, government unions demanding unsustainable benefits and wages, higher taxes a constant theme on our ballots, environmental regulations that require 8 different grades of gasoline throughout the state (which raises prices), hundreds of thousands of acres of farmland that cannot be farmed due to the Dems putting water for smelt over farmers, car registration fees so high that many lower and mid income people (especially the unemployed) are losing their vehicles, a community college system that is so top heavy it now takes 4 years for kids to finish a 2 year program for transfer to a university, and much much more.

I googled for a while until I found this link: http://www.propertyinvestmentproject.co.uk/blog/using-a-company-to-save-tax-on-rental-income which unfortunately is only valid in the UK.

In bigger cases, even with immigration enforcement. 

Typically first generation immigrants are very, very fearful of the new community that they are moving into.

I would print this out and give it to the tenant: https://www.countryliving.com/uk/homes-interiors/interiors/news/a1511/how-get-rid-of-moths/I've never known anyone who had a moth issue in their house so I did some research and I would tell the renters to keep their food in plastic containers/the fridge and make certain there isn't any open food/crumbs in the pantry. 

I am considering buying a commercial property in Colorado and am wondering if I'll have to honor a lease that is with an illegal immigrant. 

Maybe there is a new immigrant population that has flocked to the area.

Almost of those younger inhabitants are white and quite a few of them have anti-immigrant views.

My wife and I are both 1st gen Americans from Slavic immigrant parents and grandparents.