Thank you so much, Stringer! I'm in suburban TN. Each window pane is 4' x 4' and the area to be cleaned is the office complex portion within the warehouse. The only trash that I've seen is paper on the floors. We mainly do residential and apartment complex cleaning, so this would be a bit different but doable. We have all the materials except for a lift(can use ladders if necessary). The contractor said he knew it would take several days to complete, so I'm struggling with # of workers needed and overall price.