the idea would be to simply create a vm of raspberry pi OS
https://www.raspberrypi.org/downloads/next add the dreampi software and driver support. (for your usb ethernet modem)
you might be able to use on board ethernet instead...
then you have an exact clone of a dreampi that cost you
nothing.
make a line voltage inducer/simulator and your online.
some1 needs to give this a try...
I'm not volunteering.