.: I have to disagree with Rod, sort of. 

Some jobs that help are by being a waiter at a restaurant or try getting a job in property management or something real estate related of some sort.

I don’t think it matters one way or the other just make sure they have some sort of online portal.

You might also meet title agents who have resources on, say, foreclosures or probates…and might recommend lenders who actually lend on more difficult projects (as the title companies also know which lenders can close and which are difficult).I also go visit open houses to see what sorts of finish to put on my renovations or to look for the next house or area in which to purchase.  

Some investors look for cash flow and some look for appreciation and there are investors who need to merge the two in order for the deal to be considered good.I think identifying what sort of investor you are looking to become should be answered first. 

And why 20-80, is that some magical ratio, or perhaps it's backed up by some sort of statistical analysis? 

So, for police officers to investigate these sorts of things is complicated.

Its also the right sort of thing to do to try and help someone navigate a difficult time. 

All fair questions and yes, there are far too many variables to say with any sort of certainty.

You have many options here.1) Terminate the lease: It clearly states that they must have renter's insurance and the lapse can result in a default2)Have them cover the damages with sufficient evidence that they caused it3) Claim it on your insurance for the property, likely they won't give a good payout unless a fire, flood, or some sort of wind damage.