Hi Ruth. My name is Jean and I am a new member of the SAA. I also have two kids, a toddler and a teenager. I paint when little one is in nursery. Would you be able to put your kids in nursery one or two afternoons a week? If that isn't possible then perhaps you could do what my friend and myself do twice a week- where we babysit each other's kids while the other person is in gym/grocery/etc. We do this every monday and wednesday mornings and each have one and a half hours each (more or less!) to do their own thing. If you have a friend with a toddler who is also desperate for some time during the week, this could be the perfect solution for you!
Good luck and happy painting :)