I agree with you that his numbers don't quite add up. I suspect his income (if he is being truthful) is a combination of business revenue + a fair bit of private speculation.
Bryan simply comes across as another young punk who got lucky. He seems to have started in this business right at the start of an upswing and is now benefiting from a low rate environment. This punk hasn't even worked thru one complete cycle! And he is talking about retirement at 40? Kid needs to grow up more!
That's right, the only reason he is doing well is because the rates have come down and people want to refinance into the lower rate. Once the rate comes back up to a more "normal" level, that incentive to refi will be gone. Lets see how he does than.