I'm sure Elite has complex T&Cs to protect themselves, but it costs you nothing to dispute the transaction.  

I would pay one of them to review the full details of the transaction and give you a road map of how to proceed before going any further.

Not everyone has the same priorities - some care about interest rates the most, other care about the points the most, getting the most leverage, closing timeline, reputation, smoothness of the transaction, etc. 

@Jerry Cox Hey, I’ve done several transactions with Opendoor on both sides.

During the summer months there are a few events, functions and festival type activities going on so you get a few bookings around that.

Then I wrote 3 books, became the person in charge of education in my REI and had to produce presentations every month (at least 2) for it, and before I knew it,...It's not as hard as you think, at least it was for me. 

Do you have someone that manages it all including bookings and customer service or just specific parts like cleaning only? 

Do I need to run this transaction through my broker since it is not going on the MLS?

I thought it would be funny to cite his book and then do an outrageously bad job of asking. 

Now, you are asking can you use a Gap/Transactional funder for the downpayment and closing costs?