Would it be pro-rated a t all if she were to sell a few months before hitting the 2 year mark?

From my estimations considering vacancy rates, cost of maintenance etc - I would be at a cashflow negative of around 1300 - 1500 dollars per month.

My first rental, and I will have a very small cash flow (Thanks to high rates and high prices, but I took the plunge and decided to get into it anyways to build long run wealth).

I actually had to get enough units where I could offer tenants multiple housing options when I purchased properties rented at way under market rates and then (an embarassing number of times) personally watch tenants that would "suffer" from a rent increase turn down smaller (but nicer places) or  nicer places in a less prestigious zip code (sometimes only minutes away) before I realized that I was hampering my ability to earn a living in order to subsidize the lifestyle choices made by a some random stranger that happened to live in a property I bought.

If you want it it will be six to $10,000 fee but you can make over $100,000”.  

My thought process leads me to believe that she wants to leave but needs the relocation fees.

They each signed a 9-month lease at our existing midterm rental rates.

It's not that simple.1) You are going to have to pay relocation fees.

Current interest rates are a factor that we are taking into consideration but if a deal makes sense with the current interest rates, we don't have a problem reinvesting. 

I was looking at doing a garage conversion and found the estimated cost of about $100,000 would be only returning a rental rate of $900/month.