100%, it's all about perceived professionalism, if you get two spreads, both of equal quality, but one has a brand new van, keeps in in top nick, and the other works out the back of a car.. although both will win jobs through word of mouth, the guy with the van will always win over more new customers than the guy driving the car, remember, half of running a business is convincing people to trust you, and then part with their hard earnt cash, so any way you can make this easier means you will always be that one step ahead of those who don't! I get a huge amount of my work through having a new sign written van, also have won jobs purely because its been kept clean, of which most plasterers couldn't give a ****.
Lets be honest, if someones paying out a few hundred quid a month purely on van finance, to run a vehicle that they wouldn't necessarily choose to buy, purely for their business, it kinda shows they take pride in their work, regardless of how good or **** they may actually be at their job! Remember.. most **** tradesmen don't actually know they are ****.