Hi, I am interested in this project. For your requirements, I suggest that I will build a crawler framework for you, and base on this framework, I can create many crawlers, each crawler can crawl one website. This bid include the framework + 1 the crawler for 1 website. Later, if you want to add more websites, I can do it for you really quick because we already have the framework ready.
If you want me to explain more or want to discuss more on this project, please reply to this message. Also, it's great if you can provide me the website that you want to crawl at this moment.