Why I can never have a real job

I have four kids and although I am remarried, they are mostly my sole responsibility. I have my kids full time and their dad isn't really in their lives. They are getting older. I thought that parenting them would get easier. It's not. 

I forgot my shoes, I forgot my lunch, I have a sub for last period, I don't want to go for gym. Can you make me an eyebrow appointment, I need to go to the pharmacy, I'm going to a movie, I'm going to the mall.  CAN YOU PICK ME UP?

Here is the technicality, the kids need to be supported financially, but constantly need me, so  a conventional job is impossible. There is no boss in the world who would understand why I would have to leave so often. That is why I started my own business. 

I am a family business consultant- which I love, and I am a coach, which I love more. I get to make my own hours, and choose my clients (I have only said no to one really annoying guy who kept asking me if I could give him more information for free so that he could figure out if my fees were really worth it- when I say kept doing it, I mean like fifteen times in over an hour of conversation... but have cut loose a whole bunch of people that I couldn't help because they didn't need a coach they needed medication) but best of all, I get to be around for the kids, who really really need a mother.

My only real downfall as a parent is that I don't have great boundaries. The kids know that, and use that to get what they want. I don't blame them, I would too. It takes a lot for me to say no- and when I do, I feel guilty but I don't think that I am much different from most single parents. For the most part though, they really respect me and listen to me because we have a relationship that is based on respect. Since they were little, I have felt that they were people who had the right to be themselves- and now they are the coolest people that I know. 

So I have my own business and I work from home- or more often, I am trying to work from home but am having a hard time because one kid or another is home sick. I wonder if I'll miss it when it's gone...