There are plenty of network simulators around. Why no simulating it offline?
LoRa diverges too strongly when applied in the real world. There are quirks in the chip (Semtech in the latest revision did a few strange things), and in the way chirp modulation works (the one used by LoRa), that makes it a lot better to test in the field.
Hey, I just learned that you wrote the original dump1090. Thanks for that! Makes sense yhat you’re pretty good at RF stuff, eh?
Write me if you are willing to experiment :)