It doesn’t need to be spread out to have an effect. If the investments are concentrated in cities, that raises the price of housing in the surrounding areas as there is more demand for rural properties from city residents trying to escape the higher prices.
Anecdotally, I’m seeing crazy numbers for “average” houses in the small towns surrounding the DFW metroplex. Hell, the house my parents built in 2006 for $140k is now selling for $350k. 1200 sqft mass produced trac home.
But it’s an hour drive to downtown Dallas (less if no traffic) so plenty of people are commuting but making city salaries. It’s the same in every city across America.