Many would not have had the required discipline and sunk even deeper.My wife and I have a very low tolerance for debt and though we have utilized some borrowed funds to grow our portfolio it's very small compared to what some think it should be.

I depends on your knowledge, skills, abilities, goals, time horizon, risk tolerance...

We all have different risk tolerances. 

So perhaps if you own like 20 units or something, then I can see just taking a no tolerance on tenant shenanigans.

It all comes down to how much time you have to put towards this endeavor as well as your comfortability/risk tolerance of the construction world. 

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.Any lawsuits would be limited to the assets of the LLC and not your personal assets (assuming you run the LLC appropriately and the corporate veil is not pierced).

It comes down to how much stomach acid you are willing to tolerate. 

The answer is personal and depends on your risk tolerance, goals, job stability, income, reserves, savings rate, overall financial picture, liquidity, etc.

Depends on your risk tolerance (leveraging can be more risky).Private money would also be a good approach.

Much of this depends on your tolerance for risk.