Highly doubtful. I'd love to see confirmation on this one
According to Wall Street Journal, only 75.5 million households own homes: http://online.wsj.com/article/SB122341352084512611.html
About 50 million of these homes have outstanding mortgages:
http://calculatedrisk.blogspot.com/2007/12/homeowners-with-negative-equity.html
5 million mortgages by illegals means 10% of all mortgaged homes in the US are by illegals? 5 million mortgages also means 5 million people have had their SSNs stolen by an illegal and used to buy a house. I’m pretty sure I’d notice a newly issued mortgage in my credit report.
Doesn’t pass the smell-test ...