Amazing build but that $50k number is absolutely absurd. If an E36 can be swapped with an S54 with 100% integration for less than half that, I just can't see it being double for an S65 for just labor alone! Insane.
Most of the time is in the CanBus system integration and that's come a long way since those S54 swapped E36 days as well, which was the biggest challenge. And yet they're running Motec and a non-ideal steering setup?!
That number is way overpriced. For $50k and two M3s I better have 100% integration and a new coat of paint