polar vac do a vac for about £600 its cheaper but no where near as powerful, but there are quite a few people on here who swear by them so they must be ok.
eastern trading also do vacs on ebay for a decent price but I don't know anyone who has one
I have 1 its not exactly the same its branded as KIAM but its the same, I got it from ebay 3000w (triple motors) £300 delivered
also got a wireless camera & handheld monitor from china for £95
got 6 x F16 base sections for the pole for £310 which added to the 2 allready owned gets me to 45' (50' if held at chest height)
and also spent £12 on 40mm waste pipe joints to make up various attachments
I do have a 3.2kva genny coming to me for £125
All in I think it will have cost me about £850
details on thes ebase sections if possible. emailed ye last week but no reply