+1 for the Harris pole from B&Q, I've used one from day one, still use them now. You may need to replace it in a year or so (the clamps wear) but at £15 you can't go wrong. Get a £10 swivel gooseneck from Gardiners and a superlite brush if you can afford it. If not, still get the gooseneck along with a pair of jets and make your own brush up from a Tesco/Asda Bentley brush.(but you'll be replacing it in four months so stick with a Gardiner brush is my opinion!! They're expensive but worth it..)
A whole system can be made on an uberbudget, just to get yourself started, then you can replace parts for better ones eventually and keep the originals for spares.
(red hat diving do small pumps that work well, half the price of a shurflo..)
email if you need any help setting up matey, although I'm not very knowledgeable on the water production side of things.. jason at fanthorpecleaning dot co dot uk