I'm just getting on this thread and I'm sure this has been answered but I'll share anyway. I and my late husband were avid boaters. We've had every type of boat there is. We have owned a boat exactly like this one, same type, model, color, length, width, etc.
IMO, this boat was intentionally driven up on shore with the motor slightly tilted and then after fully beached, the motor was tilted the rest of the way. No way, no how could he pull or push this size boat that far from the water by just his physical strength. I will even venture that the child was safely taken to shore prior to the boat being beached. The impact of a moving boat striking the shore with enough force to be that far from the water would have caused serious injury to a small child. I know this from personal experience from hitting the beach in same type of boat. JMO.