I think it would be great - but like another person said, you won't be making money. If profit is your interest, this won't be a good career for you.
Also, just as an FYI, therapy really has almost no advice-giving in it. It's generally very non-judgemental and usually focused on helping someone uncover their own answers - not giving out yours. So, if you want to give out advice, I would recommend doing an online service, instead, which I think people would pay for. People could pay a subscriber fee and then you could help them see things that you see in the situation. I often think that someone who is a little removed from the situation often has a clearer picture than someone who is right in it.
Also, I think the thing to do when you're researching careers is not necessarily to find out how others react to it to determine if it's worth it. I think it's important that you find something you truly love that will be worth it no matter what - regardless of the marketability.
I am one of the lucky few who has found a job that I adore and that makes me whole - I wouldn't *want* to stay home or do anything else. It doesn't make a lot of money, and I'm definitely not saying that I always want to go to it or that it's always fun - but it is what I love doing most in the world outside parenting. And for me, it wouldn't have mattered what I had to do to get this job - I would have done it. Because it's that important to me. So, I guess what I'm saying is that if you can find something that you are passionate about and love and that makes you feel like a million bucks - then you should do it.
Good luck!