Thanks for the reply. I will try to block the tickets as you said. Though my mom is 76, they said no one can accompany her. They said they would have folks to help her inside.
Jenimmi, Roughly the process took about a year.
Process
The whole process is quite simple. Just follow the directions as they keep sending you the forms. Do not send forms before they ask you to. Be very careful in sending all the required documents, or there will be a delay, since NVC takes about 4 weeks every time you send the forms in. So if there is a mistake and you re-send it, it will delay you by 6 to 8 weeks. Medical clearance, and police certificate need to be taken only for the interview. Medical clearance can be done only after they send you the interview appointment letter. Please try and get your father's birth certificate ready, since that is where I had a lot of problems.
Timeline:
Filed I-130 in Jan 2005. Got approval 4 weeks later. Need to submit ur Birth certificate to show proof of relationship to your dad.
April 2005- received the first packet from NVC (Designation of agent).
June 2005 - received the DC-230(Biographic data form, Part 1, and Affidavit of support forms, along with request for fees)
December 2005 - Packet received by Chennai consulate. (It could have been sooner, but I delayed in sending the forms back, and I forgot to attach W2s with the affidavit of support). This process could have been over in Sep/Oct
Jan 2006 - Received intimation from Chennai consulate about Feb 23rd interview.