I have 4 vehicles to pick from and I just drive what I feel like driving. It's a damned if you do and damned if you don't situation. When I bought my last dump truck brand new I got lots of comments from clients that I service on a regular basis. All the comments were basically saying "you charge me too much if you drive a nice truck like that". So am I not supposed to buy new vehicles to grow my business? There were so many comments about the dump truck that I have a set of stainless wheel simulators setting in my shop but I won't put them on because I don't want to draw anymore attention. So I usually take my 02' 2500hd pick up. It has no modifications to it and is just a clean pick up. However, sometimes I take my Camaro (383 stroker and loud) and never get any comments about it. I think as long as you are not pulling up in a jalopy and have plenty of pictures to show your work, most people don't care what you pull up in for a bid. With that said, I make sure that my pictures show the jobs in progress and that way the potential client can see I have the equipment to do the job right.