Following Sean’s instruction, I signed up for Google Ads.

@Eunice Sadsad  also have an instruction sheet upfront if there is a common issue. 

Create a calendar with the recurring maintenance items (such as changing the lock batteries) that will remind you when things are due, so you can follow up with your team to make sure they happen.The lock I use is a RemoteLock 5i - it's a bit more expensive up-front to purchase, but it's a wifi lock and not only can you change the codes and trigger lock/unlock remotely, it'll provide you with battery life status AND you can set up check-in/lock instructions to be automatically emailed to your guests!  

I know this is the reverse of the instructed process, but the best path given the circumstance.