Iphone App need for a Real Estate project

Summary: I'd like to have an App built for my real estate properties list. I want to be able to put photos and descriptions and bid dates for contracts and pricing. etc... And I want it to be available for my buyer clients to see all the available listings I have. I also would all the listings to have a geocode so that all properties can be mapped.. Also, i would like it to have the capability to have the buyer to have a tracking where they can see how far they are to the property from where they are currently standing. . The sign-up link would be from a list of subscriber information externally managed. Here are additional needs: 1. I need to have a along with the app a way to input all data on my own like a backoffice to manage the app. Can you do that? For example my properties will be on a Excel spreadsheet to upload and the photos of pics will be in jpeg and videos in areas of the App. Etc... 2. I want to be able to upload videos in certain areas of app. Also, when the list of the property comes out, I want to be able to have a video button so that a client could have that option when they see the property they [login to view URL] be able to manage video upload on a backoffice management system. 3. I will need a client's lead capture page where I'll be able to for them to click a button to automatically call a phone number or click and be able to send us a email regarding the properties they are interested. 4. I also will need a capability to upload my agents and have them be geocode on there locations so that clients will know the closest agent to them. Again a backoffice system to manage all this. 5. I will also need to have the capability to upload files like PDF in the agents and customer section. 6. Also, I will need to have a capability to sell "AD" space for my vendors. 7. Also, I will need your company submitting and getting approval from the 'App store' with apple?