Thanks all for taking the time to reply.
I always plan carefully and take time to analyse things. Doing so now will allow me to plan for a rollout of website changes, van re-signwriting, a canvassing strategy and equipment purchase, all of which i'd do between now and spring. As I am fully established with a good income from WC I am lucky to be able to approach the matter carefully - if I don't fancy it, I won't do it. Any investment will be after i've seen how this winter pans out - I could get existing equipment failures, or be snowed in for a fortnight (as in 2010). Even with this I think i'm in the position to afford to be able to invest, but like anyone, I want to see as rapid as return on my investment as possible, and given i'd have very little use for the pole in my current or future day to day window cleaning the fixed cost has to be borne by SP cleaning.
Thanks again