Remember, if the landlord is trying to get rid of them, you will get a very good glowing reference.  

Private lenders would allow you to do this but not traditional banks as they want you to have skin in the game with your equity down payment.

This indicates they have enough skin in the game to motivate them to offer fair terms.With 20-30% equity, the seller can likely offer favorable terms.Conversely, a deal with a seller who has less than 20% equity remaining would be riskier for the buyer.

It kind of sounds like you're a little thin skinned and allowed their whining and unkind words to get to you.

It's like step 5/50 because you're already a home owner and been through the closing process.It's on you to decide how much you want leverage, how much skin you have in the properties (probably a minimum 20%), and what level of PM you can or want to handle. 

Your daughter may contribute her savings, and share ownership so she has skin in the game. 

As to the emotions, grow thicker skin!

My best advice would be to find a company that does it all for you....from acquisition through management....then they have "skin in the game," and are accountable to you having a good outcome.

They have more skin in the game then you do.Make sure you get clear title.

Don't take it personally and don't let it get under your skin.