It worked! Feels like magic. I'm getting 5MB/s over the internal hotspot created by the Dell. The whole snapshot is 85G internally compressed. Should be better with the dedicated router and ofc ethernet. Also had to punch a temporary hole in the firewall. Missing some transfer stats, not that necessary

Send command is, sudo btrfs send /home/snapshots/everything_set | ncat --send-only 192.168.10.100 8080
And the receive command is, ncat -vl 8080 --recv-only | sudo btrfs receive /home/$USER/snapshots/