Dave I though you would have created a masterpiece on that DIY design website you tried !! :
The one thing I would recommend, when I look at my van now I wish I'd had the 'Carpet & Upholstery Cleaning' right at the top underneath the company name, as at a glance (which is what most viewings of a moving van will be) I now think mine could read as though I do domestic green cleaning as I have the 'Green & safe cleaning services, the healthier way to clean' under the company name, then the carpet & Upholstery cleaning further down, just a thought.
I would agree, less is more - I went to the Carpex show in Coventry and some of the vans in the car park took me a good 10 minutes to read all the text on them, and that was on a stationary vehicle!!
Paul Kinder Clean