Agree with rob - at this stage you'd be throwing that cash away.
What do you want an omni power pole for ?
In truth it's very difficault to advise you properly without knowing your full circumstances and work history, what has worked for some does not for others.
Generally speaking only buy the nessesities and good quality kit, what kit depends on your target market, if it's mainly residential drives and patios then a Honda gx390 size machine will be more than what you need FSC - for me are a total waste of time ( others love them )
Your best et is to research this site, many of the better posters no longer come on here so look at past threads, Google pressure washing, some good helpful site that are not pushing you to buy products, then canvass your local area to see what business is available - get leaflets delivered and maybe just hire a pw for the first few jobs
Darran