2 sites in one? Kind of.

I am starting an IT business and doing much work on a wordpress site. I am wanting to make the “home page” VERY simple. I want to use a huge graphic with my business name and 2 buttons on top of the graphic. One button will say “Home Users” and the other will say “Business Users”. When people come to the page they will hit the button that best fits them. Either they are a current home/business user or are a potential home/business user. The reason for this is that the services and prices for those services will be quite different for home users than business users, so I want to separate all of the home stuff from business stuff. The menu’s will even be different between the two so I need to be able to have the flexibility to almost treat both sections as if they were different sites. Is this at all possible and if so how can it be done?

Any help with this would be greatly appreciated.