I am currently working on a proposal for a clients Wordpress website development which includes ongoing SEO after the website is developed. I have looked into a number of options and the one that seems the most cost effective involves using subdomains for the individual listings pages. What I want: clientsdomain.com/listings/idxnumber/ What I can get for a decent price: listings.clientsdomain.com/idxnumber/ So the majority of the website will actually exist on a subdomain because the IDX API will automatically populate pages for all of the MLS listings in the area (hundreds or thousands). Meanwhile the domain itself will have all the neighborhood pages and other optimized content, blogs and whatnot. My concern is that dividing the website like this will have negative effects on SEO. There wont be duplicate content across subdomain and main domain, but they will share a lot of links back and forth. I haven't found any recent sources on the topic. Almost everything I have found says that dividing a website in this manor is bad for SEO, but these articles are often many years old. Does anyone know of a Wordpress plugin/IDX company that can provide a solution that doesn't use a subdomain and actually just lists each MLS page within a directory? I am open to using another platform, I am just most familiar with Wordpress. Will using a subdomain in the ways mentioned above have a profound negative effect on SEO? Thank you for your time in responding, I greatly appreciate it.