I’m want,, more monitor.

I can just use iPad as extra monitor but I need to make a stand/shelf thing for it or something
Or use my portable HDMI panel since I’m not exactly busy with freelance on-site work. Annoying that it has no fasteners on it at all, I ought to 3D print a clamp that’ll hold it

Next question, do I put it horizontal under second monitor which is to the left of laptop (quite low, not a good angle for continually looking down but could be good for reference/‘at a glance’ stuff,
or vertical on the right of laptop