Telling another person that you don't have time to help them anymore after 10 years is sort of like breaking up with someone.
Hehehe this cracked me up. I can really relate. It's really more like a break up especially when u'v worked with them for as much as ten years. It's more like you guys have established a relationship that was supposed to last forever. I am suprised that they didn't come to tears, especially the female clients.
But it's all good. The basics is that you are happy with your decision and I think that's all that matters for now. Do what makes you happy ad life goes on.