Yes, this is a huge factor and risk. And Nic directly addresses it in the Q&A:

"It's all about hiring the right people. I'm worried that those people are going to be hard to find, and it's going to take more time than we thought to get those offices running the way that we want. Logistically, we can open those offices very easily, fill them full of product, and market them. But being able to provide a high level of service like we do now is going to be challenging.

And the Form C:

"Our future success depends of the availability of qualified pinball technicians in the major markets we service."

It is hard to find people that are qualified and want to work for the wages that are typically paid. One idiot service tech can cost you a ton of time and money.

I took my phone number off my web site. I still got calls. I now state on my web site that I'm not currently booking repairs and I still get contacted. Previous customers and word of mouth keep me as busy as I want to be. Back when I had all my contact info on my site I couldn't keep up with in-home repairs and maintaining the pins at my two locations. I did it for a year, then after the Thanksgiving/Christmas/New Year's rush one year I said the hell with it, took off my contact info, and cut way back on the number of in-home repairs I do.

One of the things that really made me stop is on Thanksgiving I had a guy call me on my home number, not my cell that I use for business, wanting his game fixed. He wasn't even a previous customer. Sorry buddy, no way am I ever fixing your game if you call me at my home number on freaking Thanksgiving.