So we’re gonna start shipping granny out to Mexico?!?!?!?!
Yes and no. Technically in Mexican territory, but contiguous with the US border, and under special rules.
One concept of such medical enclaves is that they are fenced communities, built and operated by American companies, but with most staff being Mexicans, with some specialist US doctors.
The North entrance leads to the US crossing, and authorized American citizens can easily go back and forth across that border, which is not for non-US nationals. The South entrance to the enclave is just for authorized Mexicans to easily go in and out.
The enclave itself has hospitals, nursing homes, housing facilities, support facilities, concessions, etc.
Mexico benefits by earning a whole lot of money in the deal, and the Americans by saving a whole lot of money.
North of the border entrance, there is a small airport and rail terminal, as well as a highway. This will make supplies available as the enclave much easier to visit by authorized Americans.
To put it all in perspective, nursing homes in the US are now so expensive that ambulatory elderly people are instead living on cruise ships for about the same price, and getting more and better care as well.