when you stop competing for the same strip of land, 10 miles from the pacific ocean, it turns out there's a sort of stupendous amount of land.
while, yes, there will technically be some competition, in the areas under discussion i don't think it will meaningfully effect housing prices.
(i could divide the amount of land in rural america by the number of possible work-from-home employees and we could figure out what it'll do to the average population density. but, hell, i've lived in these areas, i don't need to.)