I served 21 years and saw real combat.

The moment she became combative, you should have started the eviction.

(and if not a member already,  consider joining RHA or other landlord groups in the area that, among other things, are working to combat or at least moderate rules like these)

Not enough responses = priced too high (assuming your marketing is dialed in).  10 showings w/out an application = something is wrong with the unit (cosmetically: not clean, didn't replace blinds, etc = clean it up more) OR (functionally: unit has issue that comparable units in the neighborhood don't have - street noise, weird layout, etc = lower price to combat issue).  

But, even without a contract, it's still - reasonable - to put responsibility on a tenant who is responsible to pay all utility bills, to have to notify her landlord of a problem if she then wants to make him/her responsible for the problem.There is a way to present this to the tenant in a non-combatant way. 

I'd love to know what other people are seeing or what they are doing to combat this.

To combat this you'll need to quiz references.

If I was trying to do anything fraudulent I would deleted this account and not try to explain myself.

For $50 anyone can produce fraudulent documentation from the internet. 

Then proceed to combat every simple piece of advice given.