Hi
yes the ebay thing seems good and well put together, you may want a bigger battery though or to connect it to the car battery. Alternatively you could get a 100psi sureflo pump and digital varistream (on ebay) and a leisure battery for about £200. The 100psi sureflo pumps are more common, and some parts are availiable.
If you did buy these seperate parts you could bolt them in a small box for your car. The 5 speed pump box is good, though you may have difficulty repairing it if something goes wrong.
What car do you have?
A large tank instead of barrels is much less hassle, though check whether your car can take the weight. 250ltrs is 250kg +25kg for the weight of the tank, thats 1/4 of a ton, when i tried this in my car at the back it looked like it was doing a wheely, not safe!
Spreading the weight i have managed to take 200ltrs in a 1.6 car in barrels, ideally you would use a van or a trailer.
I have a flat 250ltr tank and Steel securing bars to bolt to the floor for sale and some other equipment that you might find useful for sale
here :
www.cleanitup.co.uk/smf/index.php?topic=57347.msg49099On ebay there is also a 100m steel minibore hose reel for about £120, which is quite common, and sufficient length for most properties (300ft) which you can fix to the floor.