Thanks everyone. This is our current setup. We are used to it and like it very much and want to duplicate it. Scott's solution looks like exactly what we need.
We can sit on the stool and use the touchscreen for setups. Then the wireless keyboard & mouse let us operate the control computer from closer to where we are working. The quilt frame is 12 feet long so over the course of the day it saves steps. We do not connect the control computer to the internet. We have a laptop that we use for internet connectivity whenever we need it - usually for training videos.