Parking Structure Windows

We recently have been inquired about doing windows on the outside of a parking deck. While I am fairly confident in my abilities of pricing ground level to 15-20ft, I am a little stumped about these windows. By my estimations, there are three stairwells and elevator window section. They are 71’, 73’, and 82’ (stairwell and elevator section share a height of 71’). Any ideas on how to price these guys. Will be done by WFP and price wont reflect cost of purchasing necessary additions to reach.