Hugs to you! I'm glad you were able to make a decision that you feel comfortable with.
And whatever you think, don't ever consider yourself a failure because you closed your shop - you closed it for your family and peace of mind. At least you had the guts to go out and try it.
I, have toyed with the idea, as many other have, for several and getting serious about it. However, I still have a great fear factor. You stepped out and can always say you did it. You are not the first person to put your family first and step away.
Bless you and wish you the best.