I agree with cleanabilty, 5-10 k upfront is plenty, i got a start up kit ( machines hose/wand sprayer chems, spotting kit etc) from prochem, via a supplier near me, for about 2 k plus vat, a grand on designing and printing leaterheads and cards, logo's etc (includes 12000 flyers).
The van is the expensive bit of the equations as second hand cars/vans are in demand, well round here anyway, as not many can get credit for new cars so everyones is fighting for the secondhand cars/vans.
Training is a must, but is not very expensive.
I think were better off than resterauntoors, they go out of business after just 18 months on average...