Real Estate and IDX with WordPress

Hello, I am working with a client who has a real estate office. I'm familiar with IDX and MLS and know there are various levels of support in WP for these feeds. I am currently looking at wpCasa as one offer but there seems to be some question about the framework working with our local MLS. So this is general, does anyone have any recommendations, does the wpmudev plugins work with IDX and other frameworks or is there something I should be aware of in my requirements. I know this is pretty vague but just looking for anyone who has any knowledge of this for some guidance. Thank you