Cost of modifications

[Bandalar]

I'm thinking of buying the vbulletin publishing suite for a website I'm designing but I'm going to need some modifications, and I need to know how difficult and costly these features would be in order to determine the feasibility of the project. The website is about food and restaurants, and here are the features I will need:

1. A system for reviews of restaurants. Users will be able to submit resturants to the database (which I will approve) and submit a review and rating for restaurants. Users will be able to browse and pick their city then rank by most reviews or by highest rating. Users will also be able to find a restaurant by submitting their zip code and a maximum distance, and then again rank by most reviews or by highest rating. However I do not want the review system to look like its part of the forum. It will be on a seperate review section of the website. I'm looking to implement this as a vbulletin mod and not a seperate script because I want a unified login system for the whole website, including the forum, as opposed to two different accounts.

2. A function to search through other users profiles based on variables they submitted in their profile, or account information. For example, a user should be able to search for users who picked their city as Los Angeles, their favorite food as Indian, and logged in within the last 7 days. In other words they should be able to search for multiple variables simultaneously.

3. This modification is optional, but would be nice to implement eventually. I would like users to be able to dynamically generate graphs based on user profile information. For example, a user could generate a pie chart that shows what % of users (who filled in their preferences) prefer indian food, or chinese food. Another example would be to generate a graph showing the % of users who prefer indian food (y axis) and how it changes over time (x axis).

Do any of these functionalities already exist as mods, or will they have to be custom? And if custom, does anyone have a clue how much they might cost? The first two are the most important by far, and are mandatory for this project to succeed. The third one will only be implemented at a later date if its not too expensive, since my budget is relatively limited.

Thank you!

P.S: I can't view screenshots for the modifications section, so it's hard to see what kind of mods would be available if I get vbulletin. Any way to get that permission?