I am currently working three men from 1 van, 2 men wfp using backpacks which are filled from a 650 tank, the third man (me) trad cleaning patio doors, front / back doors and knocking for payment. Works well for me, obv depends on what type of work you have tho. I used to have two vans on the road, but now that I have went back to 1 van, yes turnover is down slightly, but the important thing is profit is up due to less overheads.