I started this drawing by measuring the back wall, then drawing the vanishing point.
After that I drew the side walls, floor, and ceiling. To draw the ceiling tiles I used the vanishing point then drew a line from the corner of the back wall box to the opposite corner of the paper. After that I started drawing the smaller details on the back wall and ceiling such as the lights, the fans, the wifi box, and the windows.
I'd like to mention Kristy who I think did an exceptional job on the project.