Nobody's heard of Rofo.com? They're already doing this pretty well AND have the exclusive LinkedIn real estate app. I used to work there and it IS all about connections in the commercial real estate industry. Commercial brokers are still very entrenched and protective of their listings. The only value they have left is 'inside information' and they know they need to protect it.
Do some keyword research too, like the other dude said, mucho importante.
Do some keyword research too, like the other dude said, mucho importante.