If you can handle it, or ramp up to handle it, go for it. You don't want it to take over your shop, and start dictating terms to you or make you put your regular customers off. Once they are there, can you afford to lose them? We went through such a change about 15 years ago, and we're still here, but that customer is long gone. We bought our first auto, moved into a larger space in the same building that could hold the auto and a much larger dryer, had to hire more personnel. Then, go get even more work so that they weren't the reason for us going to work, meaning so big we'd fail without them. My 2 cents...
Steve