Haha, our kids do go under our table at times but they know not to go under other people’s tables.
I don’t have much tolerance for absentee parenting either, especially if the kids wind up seeking attention from others, by say going under someone else’s table, because they’re not getting enough attention from their own parents.
Rather than 4x monitors, how about bigger and higher resolution monitors? I have 2x 27" 1440 monitors. They’re fine to read at 100% scaling, which gives me tons of space to put things. I often run four columns of windows side by side - two columns per monitor. Going back to 1080 in the office is a big downgrade. You could do a similar pattern with ultra wide and/or higher resolution.
Monitors with a built in KVM are tons cheaper in total, especially if you care about high refresh rates. I share my M27Qs and a mouse/keyboard between my personal computer and work laptop this way.
I’m not sure that I get the need for three laptops, but you do you.