Okay, so interesting as this job seems, it is just the kind of Italian Job/Ocean's Eleven thing I could get into, there is no way that Devon could take this job. It is not a guaranteed million dollar job, and with no advance, he would basically be dooming his father's clinic by disappearing that long without replacement. He has no reason to trust ANYONE here, including the Johnson, who apparently doesn't even know him well enough to understand that as a hermetic, his lab is his medicine lodge, something he will need to do the work.
I am going to try again to give a reason to stay, but this thing could just explode on the launch pad.