How Late Is Too Late (Texas)?

[Brandon G.]

If I receive a lead from a homeowner who is behind on their mortgage payments, what things should I be considering to avoid wasting time on a property that cannot be saved from foreclosure? Is there a point of no return that, no matter what I do, the process is already too late? How do I know that that point has been reached?

To take that even further, if I intend to market to homeowners who are late, what is a good "late range" to target? I would think 30 days late is too common and not enough of these folks are truly distressed, just maybe having a bad month. What about 60, or 90 days? Is that too late to be saved? 

Any information that can be provided will be very much appreciated!

FYI, I'm in Texas.