Hi all! I'm a bit new to the SEO process. My question is about keywords. Now, I realize that in a perfect world you would want to target one keyword/key phrase per page - or so I've heard. How many keywords/key phrases should I target for my main page?

I'm working on a Dallas real estate firm website. They focus on luxury real estate in Dallas, high rises, ect.. So I was thinking of focusing on "Dallas luxury real estate" for the main page but wasn't sure if I should focus on 2 or 3 other terms for the main page.

Any thoughts or suggestions?

Thanks!