Master Electrician gives Advice for All New Contractors, to pick Service or Construction, Thoughts?

So, my son says to me, "Hey, Dad, we just got an opportunity to do new construction for a chain restaurant." And I said, "Wow, that's fantastic. How did you get the lead?" "Well, it was a company from the Midwest, and they're looking for electricians, and really want us to do the work." I said, "Chris, no. We're not going to be doing that. Number one, you're either a construction company or you're a service company. Even as an electrician." I said, "So, if you were to take on this project, what happens to your service calls and all your service work? Are you going to ignore that? Or are you going to land these really profitable jobs and leave that new construction idle while you are making more money on a service call?" And that is a huge lesson for all contractors, electrical, mechanical, residential, whatever you're doing, you're either a service company or you're a new construction company. You can't mix the two. And a lot of the new guys are