Difficult to tell with the pictures the way they are, all arse about face etc. Being that its probably not been cleaned in a while and it looks like they’ll want a halfway decent job Id allow a couple of weeks for one person for that place. You’ll do it once, check it and realise its covered in runs to the point where you need to go back and re-do it. Those horizontal beams between each layer of glass are atrocious for holding dirt which spoils the clean once they’ve dripped off.