I'm not sure if following my setup would help, but here goes...
My CNC machine uses the MB6HC control board, and is located in my garden shed. I use an old Microsoft Surface Pro tablet with their keyboard (you can pick these or similar Windows machines up from CEX or similar secondhand retailers) connected to the control board using ethernet cables and powerline adapters. The adapter has three outlets, so I effectively use the adapter as a hub.
I have my main computer (an iMac) in the house, which has a hardwired network, and I connect the Surface Pro and the Duet to that network using the powerline adapter. I also have the facility to turn on/off my CNC machine using a WiFi-controlled power plug.
With this setup, I can use the 27" screen of my iMac to run the design software (Cut2D, at the moment) and access the control board's configuration files using Microsoft Remote Desktop.
Note, I do not run my machine remotely!
Hope this helps, but I'd be happy to provide photos and/or any guidance you may need.