Can i go to the interview in Texas? (instead of Georgia)

If you notified CIS about your new address they should have scheduled you in Texas. Meanwhile you can ask them to transfer it, understanding that...

Immigration/Greenbcard thru Marriage

If your case was referred to investigations there is little you can do to speed it up. You could ask the Ombudsman, but this is not the kind of...

Working as a volunteer will not jeopardize your marriage based adjustment of status.

Like to invest around $ 60,000 to take lease of a gas station in florida, so can i apply for E2 visa for my family ?

It's on the low end, and it depend on whether you are from a country that has a treaty with the U.S. for investor visas.

Can someone tell me specifically how long my case will take more in administrative processing?

Anywhere from a week to up to a year or even longer.

Is it better to bring my fiancé to the U.S through a K1 visa or can we get married while she is here with the Esta visa?

You can get married if your fiancé is admitted, or you can file a fiancé visa.

What happens if I have a warrant in the US and plan to travel from Trinidad to the US soon?

If they see the warrant, they could detain you.

I included my foreign wife and kids on my N-400 and I just became a citizen. Will processing time for the I-130 take long?

It takes about a year to bring them here. You could have filed for them when you were a permanent resident and they could have been here already.

Turn Around Time to reply to an RFE in a H1B Visa.

No, you cannot respond to an RFE late, the case will normally be denied if you do.

Does Affidavit of support approved by NVC Can be denied by embassy during interview ?

Yes, that is not at all unusual, and they can demand the affidavit of support be done correctly and updated.