Do it, but don't do it halfway.
One thing I don't get, is how people skimp on their van graphics. (My boss included.)
Plenty of successful business who don't even use cars or trucks for anything
business related, will buy a van, and have it lettered just to park it somewhere.
They will put a full wrap on a vehicle they will never use. Why? BECAUSE IT'S REALLY
CHEAP ADVERTISING!
Now, if you actually use vehicles for your job, why not spend top dollar on a vehicle wrap?
Whenever you are not using it, park it by a busy street. (Get permission first.) It's like
free billboard rent. You just pay for the initial setup.