Used 36x24 collapsible (fold flat) wire dog crate with pull out tray.
Puppy, no longer a puppy, but also figured out how to escape.
A little spray paint and voila, will work for your new puppy, or old puppy!
Pickup at 900 Walker Ave which means you can drive right up to the front door for loading purposes.
Contact Crista clenk@umbc.edu if interested to coordinate pickup time.