I absolutely love what I do (caring for children), so have no plans to give up anytime soon. However, I truly hate the way my house and life have been taken over by my job. I have an unbelievable collection of equipment (includes 3 highchairs, 4 buggies, 3 travel cots, and at least 10 car seats), toys, files, paperwork, posters, and a dirty, great minibus blocking half the drive.
We have converted our loft to house as much as possible, and converted our garage to be a child-free, "adult" room for our own (grown-up) children, all at great expense but necessary for quality of family life. It looks as though we have small children living in this house, but my own children are all adults.
I have been minding for over 14 years, and certainly benefit financially from my work, but it doesn't take account of the (more and more) unpaid hours of work I put in. I pride myself on doing a good job, but really resent giving up weekend and evenings for courses and paperwork. I do it because I want the best possible grading from Ofsted and to be the best that I can. And I totally resent the fact that it will involve more unpaid hours in September.
So, to answer the OP, I obviously haven't given up - but all the above would be the reasons I would cite if I were giving up. Rant over, thankyou.