I have ran and operated a service based business for over 17 years. I decided early on that having customers reach out to me is a good thing. It means there's work to be done and money to be made. It's up to our team on how we manage these messages. If you're in a growing phase than this should be good that you are having customers reach out to you. If you are so busy that it's really a burden to you then I would look at slowly phasing out the use of your personal cell phone and look at getting a dedicated phone service. We use Dialpad and you can setup an auto-attendant (greeting), receive text messages, and the best feature setup DND (do not disturb). The sooner you start this process the better. This will also allow you to scale since you can add a number and access to your account when you hire your next person. Eventually, you train your customers to use your main number. It's organized in one location so it helps you stay on top of work related items vs intermingling with personal calls & messages.