Filing 4 separate I-864's for siblings? (and assets question)

Usually one form is sufficient for kids of the same amply. Assets are ok if you have enough.

State law and immigration law are two different things. You have to terminate the marriage one way or another through a family law filing. Either...

State health insurance and Conditional green card.

Discuss your eligibility with the program officials. They are the best people to answer your questions.

Does US government report in any way to your native country after you become a US citizen?

I don't think they report anything but I also would not recommending you lie a out it later to your country-'s government.

Does receiving federal emergency medical services affect my I-864 sponsor?

You can only get benefits for your unborn child. Not for yourself except in an emergency. Ultimately after the green card is approved your aunt and...

My friend was deported to india 3 weeks ago after she was detained at the san diego border. She was on a student visa

She most likely cannot return for five years. Would need to review her documents to be sure.

Your proof of income and pay Stubbs and tax returns and a letter making them an invitation to stay with you. You could use an I-134 form.

L2 to green card

You need to remain in status until your green card is filed. There is one loophole that allows you to file your green card up to 180 days after you...

I am currently on a B2 visa and have applied for a O1B. Can I stay in the US after my B2 expires while waiting for the O1B?

Yes you can while waiting for a decision.

In 400n form do I need to list parking tickets?

The wrong direction? At least you are clever! Yes. List it. It will be fine.