Isn’t Manning a single guy with a girlfriend who lives in LA?
If that's the case then the move makes more sense .
Lot's more flexibility for housing in LA if you do not have a family.
Actually it is a good move if he is building a resume to be a head coach. Obviously he must not be a Defense only guy or he would gone somewhere in a defensive role. He probably has enough experience to be a DC at a small school at this point.