As peter said 30 screens causes unecessary issues. Could be crashes and slows. You can do whatever you need to do with layouts.
Also check this: What are the benefits of using single screen and not multiple screen
Its all about keeping your work organised. 30 screens can be 15 screens with two layouts each. Or 5 screens with 6 layouts each and so on. Just organise your blocks well and name your components consistently and it should be fine.