I’ve had that happen to me s few times and what I have done is I write an addendum to the lease stating who is leaving and who is staying in the apartment signed by both parties.

Also should I be worried when researching on Airbnb that the market seems to be flooded with multiple Airbnbs in that area or is that a good sign that short term rentals are a hot commodity?

The idea of finding a seller that would sign a "Subject To" agreement without attorney help seems very hard to fathom.

Which brokerage are you signing up? 

One had me go to the office, fill out papers, sign papers, took $100 start up fee from me then told me "we ll drive to the addresses and let you know if we can do it" SMH. 

And I was surprised to learn a select few companies have prioritized quality over quantity.

The buyer is signing a purchase agreement with me, and she wants me to do seller financing for 50% of the purchase price. 

That is probably something they should explain when you sign up. 

I was looking to sign up but I'm doing a little research first.

Also, one must be selective about the area where property is located.