What is best to do and what kind of consequence can we have if he stays ?

You correctly identified the options. I recommend consulting an immigration lawyer to discuss the pros and cons of each. Good luck.

I am Permanent resident and i want to invite my daughter as a visitor. What documents should i get ready ?

She needs to show her intent to return to her country after her visit. So evidence of her job is a good start. A return plane ticket. Letters...

How to apply for visa change of status from F1 to green card after marriage?

Searching the Avvo website is a good start, also www.ailalawyer.com is a good start. Asking prospective lawyers whether they've handled cases like...

When and where to send co-sponsor I 864 form?

If all you filed was the I-130, then you don't do those yet. If they also filed I-485s, then USCIS will almost certainly ask for them when they...

Unless you are a drug abuser or addict, immigration needs a conviction in order to deport you. You could have issues re-entering the U.S. if you...

When will my work permit be approved 5 months after filling i 360, i 765 and i 485 together?

I don't know that I understand your question, because you seem to answer it yourself. I would estimate that the work permit would come about five...

What form do I need to complete to sponsor my Aunt and cousin to come to the United States. I am an American citizen?

U.S. citizens can't petition for green cards for aunts or cousins. They are also going to be subject to the Muslim Ban.

Can I file I-485 even though I-130 is still pending?

Yes, but at this point it may make more sense to just wait for the I-130 to be approved and then filing the I-485.

When can I send I 864 cosponsor form?

It doesn't go with the I-130. It goes with either the I-485, or to the National Visa Center if the person isn't doing the I-485.

Will changing jobs negatively effect my I-864, even if my new job is still 125% over the poverty level?

No, you will be fine as long as you still qualify. If you already sent the I-864, I'd just have the petitioner bring an updated one to the interview.