Will I have issues applying for a marriage-based green card if I haven't sent yet the documents after 4 months of my wedding?

Agurissimi. Have a Skype consultation with an attorney to develop a proper list of documents. You say that your 'visa' expired. But, I suspect...

I file i 485 and then a file to renew my green card and piad for both do i get a refund on the fee for the green card

Are you saying that you filed BOTH a form I-485 and I-90? If so, that appears to have been a mistake. If you're lucky they will reject the...

Does a conditional Green Card holder (CR-6) have the same rights as a regular Green Card holder?

Yes, a CPR has the same rights as an LPR.

Did the officer tell you which I-751 was rejected?

The petitioner should file a G-639 FOIA to get a copy of what was filed 14 yhears ago.

Can US citizen sponser a friend or a non family member financially?

Yes, a friend can pay for your tuition/books, room & board. You can only work ON CAMPUS.

Immigration waiting since 2018 oct?

Things are taking a long time. File to renew the EAD ... TODAY.

How can i delete joint sponsor ?

Are you saying that you uploaded to the NVC the same joint sponsor twice? You may need to call the NVC to have them delete one of them.

Your question is confusing. Is the employer issuing 'small' checks and occasionally 'large' checks so that they total $120K?

Do I have to be in the US after I apply for naturalization?

I agree with my colleague, this is a very risky plan. Talk to an attorney in private via Skype ... there may be some protections you could put...