Who mentioned home brew, i said special brew! you know the super strength lager that you see people walking the streets with, I was trying to make the point that, surely a manager will look beyond the price of a quote.
Sorry if i offended any special brew drinkers!
A little true story for you about taking shop work from other window clreaners, this is a true story and happened to a person that no long window cleaners:
person starts window cleaning for a local guy, thinks to himself I can do this myself, leaves local guys, starts himself gets a few houses by undercutting other cleaners, then starts on shops and undercutting the other cleaners (these have been doing for years normally passed down from dad and grandad), 1 month passes, person that started goes home to find garage and workshop alight, sorts that out 2 weeks later goes home house is full of smoke with a letter you have been warned. scARY BUT TRUE 100%
there are some real funny people around when it comes to window cleaning, if you are thinking of doing this by all means try, but my point is you do not know who you will be upsetting so be carful on what you say and the people you upset.
I dont have a clue where you are in the UK, I am just saying a true story that happened near where I live.