I am somewhat limited by the weight and size on the boom and the ability to put the camera into tight spots low to the "ground".
I've now looked at your web site and have a better idea of the problem ;-)
That boom looks horribly lightweight. I'd be looking at upgrading it with something a lot more sturdy, maybe built out of the sorts of Aluminium extrusions that are used for proper motion control rigs.
The controls I need from the laptop are at minimum focus, zoom, and shutter (take picture). I remember that canon used to have its own software to A 500's and 600's. Do you know if any of the more modern compacts that have proprietary software that allow control by wire (or wireless)?
A lot of the better compacts allow wireless connections to phones. The proprietary control apps often leave a bit to be desired, but some third party apps are better (qDSLR on Android). I've used Canon's Connect app to control DSLRs remotely with good success and that works with their compacts. I've also managed to get my little Sony RX100 M5 hooked up to a phone too (although the Sony system is arcane, very unintuitive and I seem to have to relearn it all every time I try to use it).
Most these phone apps offer monitoring and control, so might be suitable for you, but you may have to shoot, then load into Lightroom after the shooting session.
Sorry, but I don't know much about any that offer physical tethering.