I've flown inside a barn conversion of a wedding venue after I fitted all the flooring there.
Started outside but couldn't get it to fly through the patio doors....proximity sensors....after a quick land and switch off of sensors i was able to try again.
This time in through the patio doors, through a smallish bar area, through a single doorway which was the hardest, down the length of the main room and then out backwards through 1 of the large bi-fold doors to pan out to the whole building.
Might I add that barn had wooden beams and all the doors were composite not metal.
It was more for my confidence of been able to do it ???