We have a small shop making awnings. I do all the estimates, a lot of the sewing, all the ordering and I make the schedule for everyone else. I do have several employees, however most of the stuff I need help with, they can't/shouldn't do. Well intentioned people told me to delegate - so I tried to train several people last year. Let's just say, it went poorly. I ended up spending more time correcting/explaining how to do something than if I just did it myself.
The only real solutions I've found is 1) work some crazy hours - sometimes 3 or 4am to 5pm. 4-7am are the most productive hours for me since I'm in the shop alone with the door locked. After 7am is constant interruptions. I don't always work that early, but I never regret it when I do. I will often take the weekends for personal stuff to balance. And 2) get rid of the tire kickers as I call them. I started putting into place minimum prices to scare off the people "just pricing" or "trying to shop local". My time is valuable. If I'm not using my time to bill out a job, I have to at least be spending time securing a future good paying job. If your phone call/email/visit doesn't help me accomplish either of those things, I can't spend that time on you.