I have been consulting since 1972 and have had employees and have worked alone. You get much more done when you develop your own system. I don't just mean do this at 8am, that at 9am. I mean 1) take your knowledge and expertise, 2) systematize it so that you can easily do it repeatedly, 3) sell the use of the system to your clients so that they do the heavy lifting and you do the advising. Michael Gerber explained this years ago in his E-Myth book series. Well worth reading.

We started tele-consulting in 2012 and it has been a great success. We don't have to travel, we get $3,000/month for a couple of consultative phone calls, the client does the work and assumes ownership of the project and the result and is happy.

You can spread yourself around if you plan it.