I am planning on crating puppy at night (and waking to take him out to toilet), and using a long-term confinement area during the day (an ex-pen with a toilet area) while I am at work. I was planning on attaching the ex-pen to a wire crate and having that be the "day time" crate for sleeping, and having a plastic crate for night time sleeping, outside of the ex-pen. Is this a waste? Should I just stick with one? Wondering if I should not get a wire crate at all and just put the plastic one inside the ex-pen during the day and take it out at night? Thoughts?