Modifications with OpenCart Script

Hey there, I am working on an online book library + bookshop. My core Business model is online Library though. I have already made a website [login to view URL] It is based on OpenCart platform. I need someone to do few modifications for me. 1. Change Wishlist........ I want to change wishlist to BookShelf where my members can list the books they want to borrow based on their priority. This Bookshelf to be linked to database and to admin so the librarian can ship books to members based on priority and availability. 2. Adding an API script to the site....... I want an Amazon ISBN Search, or Google Books, or openisbn API or maybe all of them to my site. Once I enter an ISBN number the script should lookup the book database from these databases and fetch Title, Author, Publisher, Synopsis, Image, Pages, Size, and other information and be able to write it into the database. I tried to write a script but it is not working very well for me. [login to view URL] I also want this to be able to import about 100 books in loop or something. Here is the list of ISBN Numbers for reference. I can put one category list at one time. 9780425096444 9780425127933 9780425209448 9780425131909 9780425195185 9780425208489 9780425232811 9780425138700 9780425175019 9780425170830 9780515141467 9780425245040 9780425240786 9780425097267 9780425176597 9780425176627 9780425105337 9780425242933 9780425244463 9780425240496 9780425146156 3. Shipping/Reminder Notification...... Once a book is shipped from bookshelf to the member, admin will change it's status to shipped. It should move to bookshelf/history. A member should have access to their history. As soon as the book is moved to history, it should send an email to customer that the book is shipped. If the book is not returned in 1 week, it should send another email reminding member to ship it back. Please let me know the lowest cost of writing these scripts. I can do it myself also but it will take me very long time to do it. So I am looking for a Pro to do it quicker for me. Please note that I am on a budget. Vick.