He loaned me the 20% that I needed, which allowed me to use my funds on another project simultaneously.

Why are Title Companies hesitate to do "Double Closing"/ Simultaneous Closings ?

But I suppose as you grow that initial pile of money and it gets larger you will be able to lock up more deals simultaneously, assuming you have deals coming to you.

If you need all 6, to qualify, you can simultaneously do all your properties with a portfolio lender as cash out refi's.

@William WallaceIf you're talking about using hard money and conventional money simultaneously- that will be difficult.  

Today I’m hoping to close 2016 by managing two projects simultaneously, each at a price point that once seemed impossible.If I wanted to, I could give up on the Sarasota-Venice-Englewood market and focus on New Jersey.

Even if it's all simultaneous, technically you are using their money to buy yourself a property and the escrow company will require that they sign an acknowledgement, and that's if you're using a company that will allow you to do it all.

I would try to get a short sale while simultaneously trying to find a seller-finance buyer like you described.

Given the facts that they are appearently in a hurry to sell and simultaneously uninterested in marketing with an agent because they Dont want to give them 6% of this enormous one month windfall I would guess something is amiss.

Double closing or simultaneous closing at a minimum... or better yet use transactional hard money loans and close with your buyer the next day.