Clay, I know that there are lots of people who seem like they are discouraging you. Don't take it like that. They are only trying to express that the car wrap business is not as easy it it would seem. And it's not - we just started doing them a few months ago and although we have done a few partial wraps, I am not sure at all that we are ready for really complicated full wraps.
But, if you have related experiance, and you do, it is not as much of a stretch to go into the wrap business as it would be if you had no experiance. We have been in the graphics business for nearly 20 years, and we have found that our experiance with graphic design and sign making (and offset printing and screen printing) and the fact that we already have a customer base and business location, to be invaluable.
Learning to do wraps is just like starting any other business. There is a learning curve, there is an investment in learning and training, and there is an investment in equipment. People start businesses every day, and many of those people have no experience at all, and some of them become quite sucessful. If you really want to do wraps, you can be sucessful, and since you already have a related business, I am confident that you already realize what the challenges will be.
Our business has several departments, every time we started getting into something new I have had people telling me a wide variety of reasons why we should not do it. But in virtually every case, I found that we eventually overcame all the issues and most all of the new business ventures have contributed to our success (although I admit that our success has been very modist).
If you really want to do it, there is absolutely no reason you cant. Just be aware of the challenges, be prepared, start out small, take your time, have realistic expectations, and go for it!