It sounds like you’re handling things well by setting up systems early.For this tenant, a calm and professional response is best to maintain a good relationship while reinforcing your policies.

I was kind of skeptical, but seems this city/town is good place for STRs based on your response.  

Youre right, but if you are doing the work yourself it can be daunting because the buck stops with you and having that responsibility on your plate 24/7 every waking hour of the day and putting in 12 hour days, it can be rough.

After reading the rest of your responses, I see that you're coming here for a job. 

I think she is equally responsible if she is 50 / 50 ownership per the offering and through thier own discussions on podcasts, social etc. 

My quick response time and attention to detail is not matched by many others. 

Thank you all for the thoughtful responses.

I was imagining responsible car-free tenants, as I was one myself for a long time. 

Learning how to responsibly use debt is one of the best tools any real estate investor has at their disposal.

Managing a rental (even if it cash flows) comes with responsibilities, and it might not be worth it for $300 a month.