Hi,
we at XTPL have developed real estate apps before for iPhone.. The App was GPS based sysetm which would tell you based on you location, which are the near places that you can be interested in. It also used to tell based on some formulae whether the land is a good investment for yo or not with the ROI it gives.
So we have done such portals.
It would cost you about $5000 for the iPhone app and $7000 for the web portal. Since we have done this before, we definitely know the complexity, but we also have expertise who have knowledge of how to build the application.
Please find my company profile mentioned below.
XTPL :- XTPL is in mobile application industry since 2005. We have developed over 500 + mobile apps so far. Atleast 300 of them are on iPhone. We have a team of 120 astute employees who are divided in to Mobile application designers, graphics designers, developers and testers. We have different teams that work on different platforms such as iphone, blackberry, android, windows, symbian , palm etc.
Our client list contains prestigious clients like waltdisney, sony, konami, TATA eleexi, india games, playscreen etc.
Let me know if you want to talk about it.
regards
Kapil
skype: kapykaps