I thought you ran a home made trucky Jim ?
Like Jason says,if everyone had that attitude then we would all be in the dark ages,what have I got to lose.
Just ordered one Lamb motor 1500 watts,£200 for 2 more,that will give me 4.5 thou watts of suction,and if I decide to bin the idea,I have 3 spare motors for my Prochem.
£200 ish for a tank of some sort,which can be used as a solution tank if it goes t1ts up.
200ft of 2 inch hose,well I can get an adapter and use that on my machine.
Few switches,ball float ,filter and manifold,with some metalwork thrown in,which will be done mates rates,could knock this out for under a grand,then another grand for the pressure washer.
Will be a scrap heap challenge special...
Just found this,which makes things easier,for making up a manifold,as all the dimensions are there
http://www.alltemp.ca/vacuum/pdf/11651313.pdf..
Just need the formula to work out tank size,not sure what effect that will have on recovery etc,had to ask a mate about that