Aspects,It really depends on what part of N. America you are moving to when it comes to window cleaning and using wfp
I think in a previous post you mentioned Canada
Some of the things you will find different there as opposed to the UK are,
Many customers will have what we call storm windows ( a set of secondary glass that sits outside the regulatr window) which has to be removed from the inside to clean.the regular window behind the storm is usually a georgian type window and due to the heat created between the storm and the window the glazing or putty is usually in poor condition and can be difficult to squeegee not to mention using pure water( I spent 10 years trying

)
Due to the cold winters wfp is not really feasible from about Halloween to Paddys day, Our ssystem was a hot water system and we had to completely winterise it and shut it down for this time
The frequencys are a lot less, twice a year would be considered a lot so each clean is like a first clean( we have some customers that call about every 5 years)
I think we use regular trad poles a lot more than you lads especially on lower commercial work up to about 30ft, anything above that is either MEWP, Cradle or abseiling. Tilt in windows are becoming more common and in the older cities belt hooks are still common
Those are some of the negatives the positives are,
While there is some lowball competition out there (usually general cleaners who do some windows) pricing on the whole is a lot higher than the UK
Its very rare to miss a day due to weather even in the winter( we work down to about -10)
H&S is not as restrictive
Things in general are quite a bit cheaper here so your overheads are not that much and set up costs would not be much( A servicable van in good condition would cost about $4000)
I know people just post their worst experiences on here, but people dont mess you around as much here, you do the job you get paid no BS
As Jeff said we are quite a bit behind when it comes to wfp so an experienced user would definetly find a niche market in almost any city
Theres a lot more differences that I cant think of right now but ask away and I will try to answer to the best of my ability