Yes, thank you. Agreed on all counts. I really really doubt he is a hybrid; his markings are just pure Burm. And yeah, Burm/Ball hybrids are a thing, unfortunately. He looks NOTHING like them, and their price is well into four figures so I just don't see one turning up as a rescue.
The good thing is that we have a mutual friend with the experience and means with large snakes who is willing to take this guy if it turns out she can't keep him, so that is a huge relief and gives her time to sort out what's best.
I also think she could probably safely manage a snake up to 8' if she target trains him so that he is crystal clear about when it is or isn't feeding time and if she trains him to be held/carried the way the veterinarians at Snake Haus (the rescue facility for unwanted giant snakes) train their big guys. Her emphasis is on enrichment and quality of life with much, much less emphasis on handling - so she could conceivably find or hire someone to act as a spotter/helper when needed.