It's impossible to give you a guestimate without the full knowledge of his convictions and subsequent offenses that are the subject of his warrants

You can call/write the prison and tell them you need a document notarized. They have procedures in place to help you get that document signed. If that fails, you can send the POA to the inmate via snail mail and wait for them to return it to you.

it depends on the case current load in that jurisdiction. they will be thorough visiting the home, etc, which could take weeks at a minimum.

Yes, they use the InmateAid office address - the mail comes in and is scanned and placed into your My Account Dashboard. This serves to protect the user on several fronts. If you mail into the prison/jail with a return address, and you want your inmate to know your address, it's best to put it in the body of the letter and not the return address. Other inmates use that sort of detail to extort, blackmail or otherwise menace good folks

Inmates are not eligible for any government assistance including Social Security and welfare. Since you are asking, if you attempt to collect on behalf of an incarcerated person there is a very good chance you will become an inmate, too.

Yes, the mother cannot keep the baby in jail, BUT it is possible that she gets the baby when she gets out

yes, mail is sacred and all facilities allow it, even for indigent inmates (the facility will provide paper, envelopes and stamps)

This is not impossible - keep trying

Only if the child is under 18

Yes, we have hundreds and hundreds of inmate family and friends using the Service for the telephone discount, sending great selfies and many many magazine titles... keep connected through InmateAid