Meaningful work

I'm trying to be self-employed.

It's not going well.

I have two great clients that I love. If they had more paid work for me, I would work for them forever.

I have one client that makes me want to run away.

I have one client that doesn't really know what they want.

I have one client that doesn't actually want to pay me unless what I do for her allows her to make money, and the money making venture is terrible.

None of this is particularly lucrative, either.

So...

Do I find a doctor and get written off on disability for the rest of my life?

Given the way I feel most days, it seems like a good option.

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Marketing tips for a personal service business also welcome.