After taking a second look at that and realizing most of it was other manually added devices that aren't relevant to me, I tried this args line:
args: -netdev type=tap,id=net0,ifname=tap103i0 -device virtio-net-pci,mac=BA:E2:8A:3B:AC:3E,netdev=net0,bus=pci.0,addr=0x2,id=net0
This created a...