Joomla or Drupla referal site

The site needs to be done in about 10 days. I'm willing to pay $300-$400 This project is referall site that basically emails your friends to be your referrals for them. By referrals I mean job references. The sites design will already be made and each page on the site will look almost identical to the home page, just different text. The site can be made in Joomla or Drupal. I wanted to do it in Joomla, but my only concern is Joomla is for small businesses, and if it expands and get's big Joomla may not be adequate. My company has done many CMS sites, I know what work you will have to do. Core Functions and PAGES: REGISTER REFERENCES PROFILE SEARCH INBOX MEETINGS PORTFOLIO REGISTER: Users can view the site. There are two levels of a reference. The short version is viewable the full version is not unless registered. REFERENCE The processes for a reference are: 1) request 2) write If you've sent out a request -- a non user receives an email with a direct link to write it. They do have to register, but are placed on a page that allows them to enter a user/pass in addition to the reference information. The person being referenced has to approve the reference. On the sidebar it says "Approve Reference" Then it becomes a reference on your References page. An option is to "hide" a particular reference at anytime. There is no "delete". The client bought a Octazen program in PHP... allowing users to choose all of their webmail contacts from Gmail, AOL, Hotmail, Outlook etc.... It's sort of how twitter is how you enter in your email login and password and it scrolls through your contact and saves them (I guess). -write a reference Users can write a reference for a user or non user. One of the fields is predictive email. Users who are not a reveral user will get an email. Users who are will get a Reference request. -request a reference Asking a user or non user to write a reference for you. Reference Page: all users can view a short version of the reference which is: photo, name, and how they know user. Registered users can see full version, which is on [login to view URL] --- it's all the questions and fields there. PROFILE: Sidebar with Reference data as in Beta: Request a reference, write a reference Foot in the Door 4Hr Give / Get In the center: What Do You Do -- users input their occupation in a dynamic field Client History: users input the following information into dynamic fields... users can change this on their profile pages for their own "client history" similar to facebook's status update. -job title -location -reference contact MEETINGS: Users can set up an appointment to chat with any user. User can input email or user name into predictive field. Their profile page, the sidebar and the reference page all have the "set meeting" button. We were using Google Calendar... Once you set an appointment, both users receive notification. A Number placed next to the "meeting". The recieving user can change the date of the meeting. CHAT: The one challenging aspect here is Meetings are directly connected to CHAT. Once a user sets a meeting with another user they are added to their CHAT. It's like being friended or added as a follower.... there is no approval process for being added. I don’t know if there is a free module out there that does this. I know there are free chat downloads out there. I'm willing to buy one if you can find one that is perfect for this requirment. We'll add options for how many references, requests, chats and more a user can receive after the core functions are built. INBOX: internal email... how users can connect with each other. A number placed next to the Inbox (1) upon receiving a message. SEARCH: Search for user by name, email, user name, location Foot in the Door --searching their reference 4hr -searching users who have clicked off the 4hr minimum PORTFOLIO: Add images Add Documents GIVE / GET Users input a job, recieve a job listing notification on their sidebar when one matching their occupation becomes available.