If, after the first ten (10) days after you take possession of the Rental Unit, it becomes necessary for us to undergo including, without limitation, prevention and remediation in your Rental Unit and/or on the Premises, you will be held financially responsible for reasonable costs thereof, paid as Additional Rent.

He may get stuck with rent control laws that prevent him from catching up later. 

Encourage him to set long-term goals, connect with mentors, and use educational resources while keeping the learning process fun and balanced with other activities to prevent burnout.

It's quite ironic when you think that Tulum has regulations preventing from building more than 3 to 4 story highs and from building on 40% on any buildable lot.

What I do for my units with shared meters is I charge 50% flat to each tenant which prevents waste I get no issues with any waste due to this but the ones that share electric bills do get many complaints due to the size of the bill.

This would help ensure that we take the appropriate steps to address the issue and prevent it from happening again in the future.If it turns out that my unit is the source, I will take responsibility and address it promptly.

Avoiding problematic tenants from the start is the best way to prevent problems like non-payment, eviction, and property damage.

No one is preventing you from doing that.[3]  It seems like an open door to racism.

(And if so, how do you prevent everyone in the neighborhood from using it?)

The MLS rules prevent your contact information from appearing on websites, but websites are required to show the listing broker phone number.