My monitor is a video one, but I left our old one at my in laws for when we visit - I could just bring it back and put it in the hallway as you all suggest.

As for wanting a video monitor - Levana has one on sale right now (Jena), that can have up to 4 extra cameras for $75.99 (regular $249.99) - we use last years version of that one and it works GREAT! Highly recommend it.