We clean carpets and are a contract cleaning firm. We probably earn half our money from office and carpet cleaning as it not at all weather dependant so to say window cleaning is more profitable is nonsense :
We start work at 5am and by 9am we've probably earnt more than most lads on here will see that day so to say other forms of cleaning aren't really worth considering is short sighted. That's not a boast or anything just the way it is.
To the original poster, go for it but don't spread yourself too thin. Only spread your wings when you are financially secure enough that you don't need your add on business to make you money from day one as it will take time.
Good luck
