...I can contribute some code if this is the desired path.
Thanks a lot. Sure, please do it. But I'm not sure that such Enterprise-level feature will appear in the near time. Anyway, I've just created a work item
A nice feature similar to rental would be a reservation system for a hotel/ house owners with online booking. A down payment should be optional like a fixed fee or a percentage. That down payment must be paid on reservation.
More CMS features so that more customer pages and text can be added with nice SEO proof url's. I know there is a plugin, but default out the box would be nicer. In particular since the footer needs SEO improvements for 1 language. For multiple languages I do not know if the SEO is better.