He will pay it back plus the interest the bank is charging the parents.

My bank statement is one to two pages at the most. 

If you have $20,000 in the bank,, why would you borrow $20,000 at 2% interest?

Which banks or credit unions are offering the best deals? 

Keeping the money would take at least 90 days or more to redeem, because on Friday I learned that: "Timeline- could be as early as 90 days to close given we are working through bank equity review requirements and working through a slip and fall who is suing the GC so working through that issue as lender needs comfort on that issue.

Should I ask for his bank statements?

I believe the greatest security you could put in place would be to take a 2nd position lien on the property behind the bank her financing is coming from.

You can send a wire to a US bank account.

They make an 8% return, like the monthly checks, and the security of and investment secured by real estate. it allows me to purchase properties without graveling to banks, getting appraisals, paying loan fees, and making cash flow without much of my own money. 

I've been looking at sites that auction bank owned & foreclosed homes.