my opinion, youre either a resi cleaner OR youre a commercial cleaner ,dont try and be both . its a different mindset for both.
its a bit like being a carpenter and a plasterer combined. that too never works out in the long run youll end up with cement spatter on your oak strip
by commercial im meaning big buildings exactly like in the OP photo, not shops
Commercial or domestic windows, makes no difference, glass is glass, I do both, no difference. Some of my residential places are bigger than some schools and OAP homes