Amp:
There is no "fault". Your situation is what it is, don't put more pressure on yourself by feeling guilty about it. I'm sure you're the only one that feels that you are to blame for all this. Don't feel bad that you can't sponsor the child in India at the moment. You helped them when you could, and that's more than other people ever do.
Things will turn around for you, I'm sure of it. You're strong, you have your family, and your faith, and the support of this community.
As for offering your services, there's nothing to lose by offering, right? From what I've seen of the sabersmiths here, every one has their own 'style' and/or niche. Who's to say that we're just waiting for you to fill yours?
I'll be thinking of you. Check in often!