Hi, I have read your project and I think we need a lot of works to:
+ Build python app to work with (if you need GUI)
+ Analyse which part you want to crawl each category , each page ,...
+ Refresh every 30 min
+ Put it in database or csv or xlsx file
If you are looking for these things , I can help you to accomplish this project as soon as you can with small amount of money and also reliability