You have already filed I-485. Continue to monitor the progress and communication from USCIS.

The nature of the process may be technical and complex for you. To avoid delays it is recommended you work with a qualified immigration lawyer.

Yes, you may locate a qualified attorney here for assistance in your case.

Contact the Hyderabad Consulate to determine if your interest for an interview can be accommodated.

Yes, you may but the nature and purpose of visit trigger extra scrutiny by USCIS officials.

Yes, you can in fact work/ commute in/ to Canada (using my PR in Canada), while living in Detroit, MI on your green card.

NO is the appropriate response as you don't have any specific travel plans.

Your mother-in-law may apply for a visitor's visa to visit US and see everyone.

A USC may apply for fiancé visa. Receiving food stamps and living in Section 8 is not disqualifying.

I would contact family law lawyers on their legal opinion on the concept of "disowning" in TX and US. Good luck.