To my best knowledge you can have the software with the same wallet run at different machines. As long as you don’t do things actively, you just have 2 nodes connected to the network.
And if you use one of the nodes to do things, the other node will recognize it (passively) like any other node would.
…at least if my understanding is not flawed.
So I think you could very well run NuBox and a PC together.
BUT:
I was asking for NuBox to get a Nu wallet running on a highly secure environment. I don’t want to have a Nu wallet run on an ordinary PC - maybe for now, but not once the adoption rate is a lot higher…
Knowing that the metaphor doesn’t work: would you like to do online banking on an internet cafe PC?
For now it should run without complications, but I’d like to have one with more in-depth knowledge answer that before you try to do it and break things…