Why should you join work at home groups?
When you work from home it is good to have a group to bounce ideas, frustrations off of, as well as use for referrals. You can refer clients to your group for those jobs that do not fit your expertise and they can do likewise.
I'm not a part of many work at home groups right now but am a part of an online VA group. It helps to have someone in the same industry who understands the ups and downs of your profession.