I'm pretty new here, but this seems like a good thread to chime in on.
I'm 42, now. I started out when I was 18, working as a model for life drawing classes. I gradually started seeing clients after about two years of modelling. Providing for a few clients put me through university and grad school for about five years. Occasionally, I did some high volume work when I really needed the money, but I didn't enjoy that very much and entertaining the steady clients was much more satisfying overall.
I retired near the end of grad school. Two years later, I married, had three children, and a pretty ordinary life. My marriage ended and a combination of circumstances related to my divorce left me completely impoverished with two kids to care for. The work I was doing wasn't making ends meet for us. A man I knew offered me a "sugar daddy" relationship, and I accepted.
For the last five years, I've been providing to a small number of steady, regular clients, some of whom were referred by one or two others, and some I found on . In the last six months, one of my oldest clients died, two others moved away from Vancouver, and another has become seriously ill.
For the first time in my life, I'm advertising for clients. I'm enjoying having more variety seeing clients who only want to see someone once in a while. In time, I may return to having a stable number of regulars. It's hard to know about that, though. I keep thinking that I'll be too old for this sometime soon, but that doesn't seem to be the case! It amuses me to think that most people "out there" would never imagine that a woman my age could make her living in the sex trade. I'm a big girl, too, which also doesn't seem to matter.
Anyway, overall, I'd say I've been providing for about 10 years, plus two years as a model.