The whole point of hiring someone though, is to distance yourself from the crime. If he had done that, then his alibi should be rock solid.
Not only is his alibi not rock solid, but it’s falling apart with each new revelation. That work trip was thrown together last minute, the condition of the room was suspicious, Barry left the wrong tools, never had the supplies delivered, and spent at Morgan’s estimation, 30 minutes or so setting up the job.
Hitmen don’t typically remove bodies, or stage evidence. If Barry did those things afterwards, then what was the point of hiring someone?
Personally I’m undecided as to if this was planned or not, or if Barry had help after the fact.