Since I don't live in the US I can't give any advice and probably wouldn't anyway. But I think that Bill needs help to deal with: 1-grief of the passing of his wife and 2- how to manage the estate.
It might be a good idea to call the social services in your area and ask if and how they could help you in this difficult time. Hopefully you'll be able to find help in your area so that the loss can be accepted.
It can't be easy... so I feel sad and sorry for you Bill. But please, try to get help, real help from real people. Not that we are not real people, but you need someone you can see face to face that can have real answers to your questions about estate and survival with the low income you seem to have.
Good luck.