For plain jane SFR type transaction you could go a whole career and never speak to a RE attorney.. the only time is usually when your getting threatened to be sued  LOL for some constructional issue or dispute.Night and Day in how we transact compared to how you folks transact.. 

Also, if you had charged for unpaid rent that goes along with not giving proper notice, that would have been easy to do and appropriate.Has the tenant already filed in small claims court, or just threatening at this point?

I had to threaten to fire her and work with another broker...

Can I legally "threaten" eviction?

The reason being is she threatened the mother  to sue if she sold the house.

A few years ago I had life-threatening health problems.

If they don't, then threaten to go to the state licensing agency, local real estate board, and every single property manager/real estate agent review website available about what happened.

We had to threaten legal action and fortunately got the money back minus legal fees. 

I do see properties cash flow positive out-the-gate on 15 year fixed financing even here in the Bay Area, but it's fairly rare.Incidentally, if you plan on future acquisitions, anything that threatens your ability to qualify for future mortgages is a threat to your income and success.

The private mortgage holder has also threatened to foreclose on their interest if they don't get their act together and sell the properties.