Are all tenants in good standing on the rent. 

Gov. mandates, laws, regulations, these are tools to control WHAT the product/service is, think safety focused. mandating no lead in toys, or fall-arrest gear for roofers, things like that, THAT is where it works. 

Thank you for taking a stand  

It's essentially using multiple novel (but legal) applications of long-standing regs to an activity that largely didn't exist at the time they were created. 

I have had several Colorado LLCs (single member LLCS with one single family residential rental per LLC, so very small-time) for a decade, and always file my periodic report so am in good standing with the Colorado Secretary of State, but have only just heard that I need to file a BOI report before the end of the year.

Not sure how it stands now. 

Are you gearing up to buy hold or flip or both? 

$200/mo has been the long-standing average in Milwaukee, but with current rates you'll need to bring a bit more down payment.However, stay above at or above median price. 100k does buy you a lot of headaches and future capex.

The 19122, 19123 & 19125 zip codes stand out as neighborhoods currently experiencing this issue.

I cannot think of a way that you (the LL who stands to "benefit" by them repairing their own space that they are paying you to use) will come across in a positive way.Plus, the tenant who incurred damage due to the other tenant's leak, may have some legal rights to have the tenant with the leaking pipes pay for the repair in both spaces.Now, beyond the legal side, you also need cognizant that most mom and pop tenants (which I assume these are) are not great with their money.