A much smaller van will cope and give, easier parking, superior access, lower running costs and you will get a nearly new van, for the money, you're talking about.
The most popular small van, for tradesmen and services is the little Suzuki with a 1300 petrol or diesel engine.
I've been using one for 2years and it carries; -
Ninja.....50ft and 25ft hoses, carpet wand, 2 upholstery wands,
Puzzi 100 spotter....12ft hose, tools.
17" Rotary....two brushes
Turbo drier
Rotowash 400
Leather kit in plastic container
Two buckets
Box of Chemicals
Plywood step 700 x 700 x 350 high for easy loading.
rob