What is Considered Being "Over-Leveraged" in Real Estate Terms?

[Greg Rutkowski]

What is Considered Being "Over-Leveraged" in Real Estate Terms?

With all of the different financing options out there, I was curious as to what would be consider being over-leveraged for a Flip-to-Hold strategy? 

I know that there are many variables to this, but it there a good or safe rule of thumb to go by when you are expanding your RE portfolio?

The savvy investor will tell you one thing, the lender will tell you another, and the agent will tell you another. What is your expert opinion?