Got to be careful and really clear here - its not an unreasonable ask - but its a totally different request (and will be challenging) to be requesting capital investment from a partner with zero actual monetary "skin in the game"

.#3 how the deal is structured....do you have skin in the deal and have integrity, or are you going to take my money and run if you end up being in the 70%.

The interest rate is about 8.5% but the cash is accessible within weeks and we would only have to bring 10% down for our skin in the game.

Lot's of different ways to skin it.  

More than 1 way to skin the cat. 

I need my own money saved to put my skin in the game.

My total rents collected are over twice as much with the three which covers the higher capital costs associated with owning three houses instead of one.Good luck with whatever you do though - there are a million ways to skin this cat!

They will want to see why it isn't selling and they will also probably want more skin in the game.

Glad you have thick skin :)  DO NOT do this deal unless you can get it for 20k less. 

It is not common that a lender will issue a cashiers check but you also mentioned that you don't want to dip into your emergency fund, so you'll need your "skin in the game" somehow.