I read that one Gentalman could not put on a big fan because he could not get it out after his build, so he put on a hatch instead.
1. remove air from the tires
2. remove the tires and put it on jacks with wheels like you see at the tire shops.
3. remove the garage door if it hangs low
4 you now have a second play room in your Garage

5. Time to start your second build only outside. Learning from your first ones mistakes.
6. remove body from trailer if you can.
When I built mine I did not put it on the trailer until after and took it outside and attached it. I at this time do not have a hatch or fan up top and found I could roll it back into the Garage

Anyone have that type of problem and what did you do?