The best career for a parent in my experience is the painting career. Gardening takes too much time, sometimes all you ever do the whole day is to tend the garden to get good crops, vegetables, and fruits. Writing takes longer to complete a book, and it doesn't make much, except every once in awhile the writer gets royalties. Once the Sim is skilled up in painting, she or he can sell the paintings as soon as she finishes them or sell them at the consignment store to earn more. Almost all my stay-home Sim moms are painters. Writing is a good side-job to a journalism career for a father. I haven't tried with the sculpting career though. Now I'm trying out the photographer career, but I'm observing it takes a lot of time searching for the right photos to complete a collection. Good luck!