A 97' wide family tree sounds like a lot of relatives to me!
What sort of image are you feeding it? Vector based, I assume?
I can't offer much help, except to say that if you are having heating issues you could rig to the door to stay open, like I have mine, and direct a gentle fan on the carriage from outside. I bent a paperclip like wire to hold the arm that senses when the door is open or closed in the down position, so I can check on prints or paper alignment without stopping the printing process. It is a small lever that is pressed down by a plastic protrusion on the underside of the lid that the wire holds down. You just have to make it like a U shape, to allow the plastic protrusion to pass between the two pieces of wire. Mine is taped into position, so it can easily be removed for operations that require the printer to confirm the door has been opened, like printhead replacement.
I was under the impression that a lengthy pause would cause a noticeable band in the print. Have others found that to not be the case?
Best of luck. Tell us what winds up working for you.