When I started in 1997 I was using my Mini for work. I wasn't then, and have never been a 'doleboy'.
I used what I had then to get me started and have progressed to a Fiesta van (not sign written or expensive, but clean and tidy.
I have probably annoyed others who feel that expensive kit/van etc are what customers really want to see, rather than a regular guy who does a good honest job for an affordable price, irrespective of their choice of equipment.
I don't look over my shoulder worrying what other w/c's are doing. As long as my customers are happy with me, and I continue to do what they pay me to do for the price I ask, I will not see the need to change my view of things.
Just an afterthought. My previous van was a 1988 mk2, resplendent in rust and two tone paint job, which I (reluctantly) replaced earlier this year for a mk4 model. Since then, I have had many comments from customers and non customers alike who told me how much they miss the old van, as they always knew I was about. Not one comment was ever demeaning.
Moral: Let us respectfully mind our own business and let others mind theirs.

John