I don't presume that the guys building trucks are also the ones building the website, but maybe I am wrong.
Hire a reputable firm to build your site; it is your "face" to the world and what everyone will judge you by whether you like it or not.
I have friends and family in the business and you would be astonished how much of their business comes from people who have awful sites that want them redone. (as opposed to new/startup or expansion business.)
This is an example of a guy who does excellent work with custom parts of Allison transmissions but has an awful site:
http://howards-conversions-allison.com/index.php
This is a very well designed and laid out site:
http://cmpclothing.com/
it doesn't have to be loud or busy or in your face, just clear and concise with easy navigation to information that people are looking for. A click and build site or a site by Joe's Graphix company is generally garbage. If you guys are busy cranking out trucks, you owe it to yourself and your current/future customers to have a bad *** site. Maybe you spend five grand, maybe you spend 20 grand, but at the end of the day, it shouldn't "cost" you anything. It is a tool for developing and growing your business, an investment, plain and simple.