Happy to answer more questions if the scenario is not clear.

No right answers, you just need to think about how long you will be in the home and if you will be able to take advantage of a refi or not. 

Does the person have something to gain from their answer?

The answer is MONEY. 

Point is, by your own statement you already have the best resource available, at hand, to answer all of this, and then some. 

I came here looking for answers as well.

We go over the lease in-depth in to answer questions + set expectations.2.

And folks from the mid west would say 3 to 4k  and some would say 5k with most folks thinking these days 10k is enough.. and then just as you say work the math backwards at 300 a month which is pretty tough to make if your max leverage and you have your answer of how many houses you have to own and manage.

Tenants are divorsing and leaving the property and we are now ready to return the deposit.  There is understandably a lot of drama between them that we have had the opportunity to hear about, but we are not interested...

I say hey, I have a buyer who is interested in the property, but at a significantly lower price.....can you check with your seller to see if it is even worth of time to putting that offer on paper. 95% of the time the answer is No.