There is a lot of talk about the future of tourism during and post-COVID and how it will affect the behaviors and choices of vacationers. 

https://www.nfpa.org/Public-Education/Fire-causes-and-risks/Behavioral-risks/Hoarding?

I still feel like I am a small time REI but always looking 5 years out and mapping my behaviors/actions to achieve that.

The amenities may be basic but the service should be class-A.have a worldview that is empathetic to poor people- ie they don't believe that poor people are poor because they make bad life choices; actually RESPECT THEIR (D-neighborhood) TENANTSdoesn't have the unrealistic expectation that low credit score tenants will respond to incentives designed for tenants with a credit score to protect and sets payment policies to promote desired tenant payment behaviors for low credit score tenantsprefers to achieve goals by eliciting cooperation instead of the exercise of power;communicates clearly and directly (even on 'awkward' topics like money and complaints about 'peculiarities')likes to solve problemsHaving said all that, I would still recommend B neighborhoods if you can afford it because of appreciation (and as @Erik Whiting said, exit strategy) .

So I have a few questions;- Should I entertain exceptions, a 'pets on approval' policy - based on breed, behavior, etc?

On top of these very crucial items, landlords will receive an Income Insights report which analyzes tenant income based on their credit behavior, that way you can determine if their self-reported income is accurate or if additional proof of income is necessary. 

However, during challenging times, you must look into your target market (tenants) and predict their behavior or feasibility that they will pay you.

The rent striking behavior you're describing is not going to fly in many markets.

Any suggestions on if I can fight an excessive fine and what else I can do to get her to change behavior?

Be factual and concise and don't name call or disparage the tenant,  just describe their actual behavior.+1 on groups like WA LL association and RHA  (rental housing association of WA)