Cubase and Ipad control

You could have that with V-Control, yes. The Pro version is $50 USD though, so I don’t know if that functionality is worth that much. It’s up to you, of course.

EDIT: Just read that the free version DOES have the V-Window feature, which is what enables you to see your plugin windows, but without editing features. This is probably good enough for you since all you want is to be able to see the plugin in your iPad, right? Hope this helps.