To add, I will refund her her prorated rent, however can I keep her 500 desposit until the cat comes home for vet bills?

If you notice my posting history I am investigating purchasing my first condo in the next few months and am investigating some potential scenarios.I am looking into living in the unit for a little over 1 year and putting it up for rent either with HCV/Section 8 or finding a tenant through my brokerage(L&F) or other means. 

After a closer look into the disclosures, it turns out that the ADU (permitted, junior ADU) was being rented for supplemental income on Airbnb.

DSCR only requires that the rents be equal to or greater than the PITI payment or the ITI payment if you go I/O interest only.You can use DSCR for a cash out refinance, Purchase and even a "Rate and term" which is when you want a lower rate or get out of a HML - Hard Money Loan, Balloon payment, Adjustable rate getting ready to expire/adjust (Recast).

@Joseph MuleroTo boost your rent plan and make more money in the medium-length rent market, think about these steps: slowly add furniture to the new place while you stay in your current home, pick cheap furniture, use a credit card with good terms, look into loan options like personal loans or home equity credit lines, try out the market by listing the place with few furniture pieces, aim for easy-to-change furniture for flexibility, and talk to pros like real estate agents or home decorators.

We're assuming we'll remain at or near existing rents for the next few years, and planning on it if our current tenants stay. 

Rent is $1100 and a similar home would Rent for $1300 today. 

My purchase price was over 20 years ago, I do not remember closing costs, have refinanced twice at least and I have been renting it for almost as long. 

This is after rent appreciation, as well as selling 5 doors and taking some great profits from market appreciation and paying off other properties to lower our debt - which significantly boosted our cash flow.   

You have to find a great deal , in a good area , find a great contractor  who can get things done fast and priced right  ,  you have to then find a great tenant who will pay the rent .