I can't think of a better topic when you have knowledge about the subject matter and are actually LIVING it. I can't see how you can go wrong if you build up your content.
Have you researched other sites out there like this? Look for information they don't have that you could add to your site. That's always a great start.
And since you know about the industry you probably know the big questions and concerns that people have about selling property. That will also help you target specific keywords.
I say go for it!
