Is it true that I don't need to submit affidavit of support for a u visa green card? whats the price for a u visa I-485?

You would not need an affidavit of support, however, if you are inadmissible, you would need the I-192 waiver.

Is it true that it doesn't take much for a permanent resident who lived in the us for 20 years to get deported?

Certain criminal convictions can get a person deported, even if they don't seem like "much."

You would not want to overstay past the date on your EAD plus 60 days and in no event more than 180 days past the grace period expiration date.

Will I need a credential evaluation of my Bachelors degree still as I have a US Masters? If so, doc-by-doc or course by-course?

The employer's attorney will obtain a credential evaluation for your non-US degree(s).

Will this charge place him at risk for deportation or removal of his permenant residency

That type of DUI is generally not a deportable offense.

If I take additional evidence to the consular interview, are the originals sufficient? Do I need to bring translations?

All documents in a foreign language should be accompanied by English translations.

You will need your passport for the AOS interview. You should not have parted with it for ITIN purposes.

Can J-2/EAD converted to J-1 before the J-1 waiver (Conrad 30) approval of the primary J-1 holder?

This is a complicated question that should be addressed to an immigration law specialist.

I'm trying to figure out how they'll financially survive here if they have to wait 18 months to get a work permit.

The asylum applicants should consult with an immigration attorney.

Will the I-130 be sufficient to file their I-485 or do we have to file a new I-130.

If you are now a US Citizen, you will probably need to file new I-130s for the two kids, since the converted IR petition for your wife no longer...