I'd be careful - this kind of thing can put you at risk if you are wrong.A more effective way to do this that might contribute value to the world in some way would be to put together a reasonable, rational, and professional post, asking for feedback, and inviting the person you are accusing or highlighting of wrongdoing to respond. 

So they now own a house that is rented and the rent covers the mortgage payment by a ration of 1.25:1 or so and they have 5k extra in their pockets and their Heloc money, which they only needed 75k - 80k of - so 100k HELOC should be plenty - was enough. to get through the lifecycle.Do not let them drain their equity from primary and just sink it into a project. 

BiggerPockets needs to aspire to perfection in every single piece of content reflecting a “rational optimism” about real estate investing - we believe in it’s power, and fear near-term volatility. 

But sometimes you have to look at it from purely rational and business perspective.

When analyzing deals its always seems as if the opportunity is passing me by and the rational part of my brain turns off but posts like yours are sobering and will help prevent mitigate losses.  

If the existing home is over 15 years old, it is now rent controlled by 1482 (even though this is contrary to the rational of the 15 year exemption).  

When I had my property management company (and the people I sold it to and manage my properties continued it) the policy was late fees are split 50/50, which I think is the ideal scenario.My rational was it takes more time and effort as a PM to collect when a person isn't paying, and at the same time the owners might not receive the rent when they should, so 50/50 compensated us both. 

The rational for hiring a PM to protect your +$2M property and its income is the same.

You can see post for rational.

It just shows economic illiteracy and a commitment to buying votes rather than supporting rational policy.