Like any of the so-called 'rules', these are really just guidelines primarily aimed at helping investors to get started. 

You need to re-establish with the tenants new rules of behavior.

Have a good credit, about 12% debt using the 28% gross rule, and an annual salary of around 75K.  

Pay close attention to the state specific laws and rules about owning property.If you are going to buy and sell property then do not take the exam.  

I'm sure they would be happy to provide a copy of the rules and regulations prior to your offer submission.

The confusion comes when new dealers/operators think the need an identity to deal in real estate, "I'm a wholesaler, I'm a buy and hold investor, I'm a rehab guy"...... what difference does it make to Harry Homeowner who or what you call yourself?"

The same rules apply to all merchant services.

Does anyone in the LA area have a general "rule of thumb" for estimating maintenance costs, at least for the initial evaluation stage?  

The 1% rule is now the 1.25% rule 

We understand rules of thumb.