IOS mobile app design and coding project

I am looking to design and develop a mobile app on iOS platform ( must be compatible with iPhone, iPad, mini ipad).
The mobile app will allow users to locate shops of certain types in different cities. Users will have an option to locate shops by
1.either by their GPS location along with radius or proximity defined by miles or
2. Give option to select by country, town and post code.

The result will be shown on a map , showing user current location and distance. Users then can tap and get detailed address, phone and distance.
Users can then be prompted to open google map or download it to find instructions to reach the shop ( need to discuss further )

User is also prompted to look into advertised deals and if clicked it would ask to enter certain specific details . User is shown top 5 deals within 10 miles of their location . Users can tap on the shop name to obtain address as described above.

Users now have an option to book the product, generate a booking reference code and receive a copy on registered email.

Back end requirement:
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1. Registration
A. Add /delete/modify a new shop
B. add a new town, country
C. Ability to add a new currency (symbol and text)
D. User registration and login using Facebook, twitter, gmail

2. Email
A. Ability to send forget password email
B. ability to generate receipt in PDF and email to customer and shop
C. Login and access all old receipts and order history
D. Show how much money saved in every email.

3. Deals
A. Ability to enter deals and promotions shop and city , country wise
B. to display deals as per location proximity and town, country match.


Please tell me your best quote and how long would you take to offer it.