I've posted numerous responses talking about the detective and the dozens of reports filed thus far.

She also is threatening court .Left carpets dirty ,lease says they are to be cleaned before move out,many holes over90 in walls mostly pinholes but some nail holes are big, mold in bathroom an blinds very dirty an 1 valance  broke, byfold floor support broke too an door left off .

Bad credit happens for a numerous of reason as we know. 

To put it into perspective, any 4 unit property that you do find (there are not many) are usually no less than $750k to get into and the rent amounts generally dont support the deal.

In this scenario, if you DON'T get an earthquake policy, you get a bit extra in cashflow, but if the house is destroyed by an earthquake, you owe 400k on a pile of rubble...for some smaller investors, I'm guessing that could be enough to bankrupt them (particularly if that scenario happened across numerous properties...if, for instance, you ended up owing 1.5-2 million on 3-5 properties that were all turned to rubble, I'm guessing that would be game over for most smaller mom & pop investors who tend to have 3-5 properties). 

We watched numerous videos, use zillow, propstream etc.

Here is an interactive map that I feel gives some insight: https://www.nytimes.com/intera...I do believe that in 20-30 years, Midwest markets like Cleveland, Detroit and Pittsburgh will be even more desirable given their proximity to fresh water and they all have existing infrastructure to support larger populations. 

And the reward on the other end is financial freedom and flexibility that allows you to support your family and your dreams without running on that RVU treadmill and feeling like taking a vacation means losing money.

Do the demographics support having that laundromat there?

I think you need to ask yourself what can the market support right now?