I've been building bespoke applications with the Symfony framework for over three years. As my preferred line of work, I'm happy to get involved in new or existing projects.
Can't find a WordPress plugin that does what you need? Why not commission development of a custom plugin that meets your exact requirments?
I do a lot of custom development for WP Events Manager. If you need to modify Events Manager to suit your business, then your in the right place.