the way to get links back to your realestate is to work for it or pay for it. There is a list of sites in a subtopic called high pr blogs dofollow list, you can use that to start getting work, or you can hire someone to work for you to build back links every day. search for an outsourcing company that can work for you to do the work you need. i hope that helps a little
There are many free ways to build backlinks and you can do it yourself.You don't have to pay somebody to do it for you.