This does sound like a good idea, one of the big problems I see with it though is that a lot of people don't actually use the forum.

That's not what I meant. I mean if a vast majority of people who regularly go on the server don't check it, then when people put a lot of time and effort into making their thread for selling their home they're wasting their time.

Most people who go on the forum already have a home they love, live in a town they won't move from, or any number of things. From what I can see, there's very few people who'd actively hunt for a new home and while they may look at the thread thinking "Hm, that's very nice, very good job making that" I don't think many would actually jump and try to buy it.

It would just be putting time and effort into something people may appreciate a bit, but wouldn't overall get you any big benefits because the right people simply aren't perusing the forums for homes. Not to mention a lot of people would probably simply hire a builder to make their home, or would make it themselves.