Project Subcategories by Client

I keep one "Project" per client so that it is not so cluttered on my project page. Would love to be able to submit and resubmit specific project design pages and not send the entire project to them. Or a way to subcategorize designs by room or project within a project. When working on a whole home or a recurring client with a lot of work I find it frustrating it sends them old designs with new ones. I like to keep my invoices and billing and all project activity together per client/project. Hoping there is a better way to organize and allow for this!