Scrape House Listings and Upload to our site

Looking for someone who can scrape house listings from public sites and upload the listings onto our site so we have listings. There will be probably 20,000 listings along with 10+ images for each listing. This needs to be automated so that it doesn't matter if there are 2 million listings or 10 million listings.

Would also like to be able to upload the listings to multiple sites if we can. If you need to know how much data we need you can look at any typical house listing on the internet. We need everything price, details, images.