How are you currently making any money on your site? If so, how? If you are not making any money of your website right now, I would strongly recommend that you put adsense ads on it.
Without knowing the niche, real estate traffic is golden. AdSense should be your last choice. Test some cost-per-lead affiliate programs, you should be able to make a lot more than with AdSense.
I agree 100% Adsense can only get you so far. You could make so much more with CPL affs. www.azoogle.com www.copeac.com Those are good ones.
you are so lucky. having a site in that niche and getting 5000 uniques per day will make a killing on adsense
But I fear his audience is targetting the Indian market which as of now is not yet as lucrative as the American or UK audience as far as adsense is concerned.
Seems like you were not making any revenue from your site (untill now) since you are so satisfied from that. Now, try to invest those money to increase your traffic a little more and help your adsense earnings to increase even more. If your earnings keep constant on that range, you should be around $7k /mo from that site. I would suggest you to look after alternatives aswell, give them a try too, check which one works better and when adsense earnings will start to become smart pricing or decrease in clicks then you are ready to replace adsense earnings in a different way. Don't stick to one strategy only.