None that I know of will do a “dry” double close where you use the end buyer’s money to fund the front end (A to B) transaction. 

People are fixing to be left high and dry one way or another as the arrows come from all sides.

With programs like California 45% Partnership, hold some dry powder to buy in the next recession.

You sound like you have that already and will waste a lot of time giving up what you’ve built in one MSA to recreate in another MSA....while you’re overseas.To your question: Option D: cash out the most appreciated house and use that for dry powder to acquire the next rental your awesome team finds.

Later it boosts the amount of dry powder. 

Some of the 90's were restricted with the proverbial hair/soap rats we find.

Money Mustache, "You should treat that like a 'my hair is on fire!'

You are right, but rarely are things that cut and dry in reality. 

@Bill Brandt appreciate the advice- she has owned the property for some time now; not having all information i believe she had a market she was doing well in until that market dried up, decide to sell and that fell through a few years ago.

it used to be a dry cleaners. hired an lsrp and did all the research. got to the point to we know the cost to close. 200k left to spend.