Help: Ergonomics of Portable Monitor + Getting Macbook and Computer off the desk

This is the classic Ikea Countertop over a standing desk motor.

I've been using this desk as-is for 4 years now, minus the portable monitor which I just added for travel (and use it as a music-player screen pretty much when at home).

I have a few goals but I'm struggling to find something to make them work.

• Macbook off the table: I know of underdesk mounts but my desk has a a "spine" that runs across (photo 4) that makes it hard to mount the macbook in a way that allows me to still sit comfortably and not hit it with my legs
• Desktop off the table: My gaming PC used to be where the Macbook is, but I found it to be too cramped so I switched them both. I can't put it on the ground because of carpet. Can't put on a platform either because the standup desk going up and down would tear the monitor cables out. I've seen underdesk mounts for towers too, but I run into the same problem as my macbook. I can only mount it "sideways" on the left side of the desk, but I think it would look horrible there too close to the front edge of the table
• Portable Monitor: Raised up to the height of my existing main monitor, portrait mode, to the right side of it. This will help with some of the neck pain I'm feeling looking down at it every once in a while.

Any ideas / suggestions? The main problem is the desk's metal structure which makes it using off-the-shelf kits pretty awkward or not feasible.