Corporate Housing Application for Iphone

We are looking for a professional company to build a similar application than [login to view URL] or [login to view URL] or [login to view URL] for iphone. Our application will be focused on the corporate housing market ONLY. Corporate housing companies or real estate agents will be able to pay to list their properties on the application. (monthly fee set by admin) The application will be used a second time with different design to create a local real estate application for rentals and sales of properties in one city only. Advertisers will be able to create account and list their properties also for a monthly fee or with a promo code. (exemple: [login to view URL] application for ifone)