Does an expired F-1 Visa affect the result of I-785 application?

The visa expiration generally doesn't impact the OPT decision.

You may work any legitimate job with the EAD. Contact a business attorney regarding business registration timing.

I came into the US as F1 student and got married to a US citizen. I sent my I-485 application to USCIS, and I have a EAD CARD

Yes, you may work as many legitimate jobs as you wish with this EAD.

General processing time for RFE response with premium processing is 2 to 8 weeks.

Mistake of date in my declaration of Assylum?

Yes, it can be corrected at the interview. Contact a US immigration attorney for assistance.

Hong long it takes to be approved for a EAD renewal?

General processing times are 90 to 120 days.

Contact a US immigration attorney for specific review and to determine filing eligibility.

My husband last name

There is no requirement to change your names because of marriage.

Can I engage in one time consulting with a company outside the US that is not sponsoring my visa?

The H1B controls your activities while you are inside the US only.

Can NVC be wrong sometimes- K1/k2 visa? I want to file a new petition for my children due to false hope from NVC

It wasn't the NVC's job to tell you unfortunately. Contact a US immigration attorney for future filing assistance.