I’ve never seen reports anywhere close to 4000 international applying to med schools.
And if you look at the pre-med advising pages at places like JHU, Yale, Amherst, U Chicago, WashU etc, they all advise of the extremely difficulty of internationals getting accepted. The NAAHP has issued several white paper advisories to its members over the past decade about advising international students that their chances being able to enroll in a US med schools are poor.
The requirement for 4 years of tuition & fees in escrow isn’t new; at most places it’s been required for at least a decade.