For a client we would like to work with a content hub, but their website is build on a custom CMS so we are limited in our options and if we aks their web developers they ask crazy prices to help us.  So now we have the idea to build the content hub with wordpress and implement it next to their current CMS. for example on www.website.com/contenthub/ . As far as i know this is technically possible and there are no negative effects regarding SEO as long as we link the two sitemaps together. Am i right or am i missing something here?