Winter Texan numbers dropping in the Valley

We are Canadians living on a fixed income on St. Joseph Island, Ontario. We own a small park model in the RGV and unfortunately we feel that the time has come where we will not be able to travel to the south anymore. As has been mentioned by other posters our Provincial Government health insurance only covers any medical issues up to the approved amount that is paid at home which in most cases is only a fraction of the same cost in the U.S. This means that it is essential that we take out additional emergency travel insurance to guard against unexpected events. Unfortunately the premiums for this insurance are based on pre-existing,current conditions and age. After 70 years of age it goes up every year. I am 71 with a past minor heart condition and my wife is 70 with high cholesterol and blood pressure.
We have totally loved our time in San Benito but with the rising rate of lot rentals, travel and the aforementioned insurance premiums combined with the fact that the cost of living has eroded our actual fixed earned income the time has come to make a very sad decision.