Not sure this will work in practise. What hospital administrator will want to send away their limited supply of ventilators in the current environment?
During a crisis like this, the idea is to pool resources and create a nimble distribution network. Hospitals that don’t need their ventilators can share them, and if they need them they’ll know where to request them.
Anecdotally, my wife's hospital, in a rural county with 1 case, is already at ICU capacity and pushing the limit on vents.