I totally agree that between school and motherhood there is very little time left. I have a spiritual community that I was very involved with before I had my son, but now I'm only peripherally connected to them it seems. That said, if I did have a single mom support group to connect with, I wouldn't have much time for them either! For me, it's just taken some getting used to, but I'm also fairly introverted, so it's easier for me to be alone I think.
Edit (I got baby-distracted and forgot to finish):
Fine arts!? Awesome. I feel the same about money vs. passion. My Dad spent so much of his working life in a job he hated to support my sister and me, as a single father. When he finally started his dream job (which he is very good at, by the way) we were all grown up, and if he'd started younger he could have really gone far, I think. I followed suit for a long time, forsaking my passion for the money path, losing it (the money and the passion), finding it again (the passion), starting the work of it too late in life... I definitely don't want my kiddo to inherit that mistake. I want him to know that if he's good at something, loves it, and works hard at it to get better, he can make money at it if he wants to.
Don't get me wrong, I'm not one of those people that encourages their kids to pursue ridiculous dreams of super-stardom when their kid is obviously an untalented hack, but I do believe that we should encourage passion by showing our kids how to make it happen. Call me a dreamer... I'm cool with that.