This is a very interesting problem to tackle and it's nice that you can think through the UCSF system to really make tangible how it can be implemented in this setting. Also great that it's a Choosing Wisely topic, as this could mean that other institutions have implemented this intervention and might have some "lessons learned" to share.
One challenge that I forsee for you is that the benefits of the intervention may take a long time to occur -- i.e. your intervention today may prevent a patient's VRE infection in 3 years, and there isn't really a good way to track what ISN'T happening, except to look at rates going down overall.