Just my opinion but those side mounted monitors are gross.

I run a triple screen set up using Sidecar and a 12.9 iPad Pro, plus a portable monitor with a tripod socket.

Two Roost portable laptop stands elevate the MacBook and the iPad attached to a Magic Keyboard, and this tripod for the monitor, brings everything to eye level.

Total weight is about 5 lbs including a keyboard and a Magic Trackpad, it fits easily in a backpack and it's super convenient to set up and breakdown.

Someone on another sub shared the portable monitor and tripod a while back and its worked great for me.