regex and mongodb

I need a developer with regex and Mong oDB experience. the task is: - to build a scri pt that will randomly gu ess all the regist ered d omain n ames on the inte rnet and save them to Mongo DB. There are probably more than 2 b illion do mains on the inte rnet, so the databa se sche ma d esign should be done in such a way that will not consume too much sp ace. Please note that no APIs will allow you to get more than 2 bill ion do main na mes for free or without limitations, so using APIs or any sort of third-party tools will be a very stupid idea for the task. === My thought is that we could try something like this: 1. a-z with/without 0-9 with/without -_.; 2. + TLD i.e .com, etc,; 3. then crawl the web to see if there's any mention; 4. if there is, we save the domain to the db; Just my design thinking though :) === What's your budget & deadline and how many dom ains can you get per sec ond?