I was convicted of a crime can I get Visa on medical bases

Depends on the crime you were convicted of. Sounds like an aggravated felony. If this is the case, no, you are not entitled to a visa.

Can I revoke my i175 application?

You signed the application to remove conditions. By your signature you swear that the marriage was entered into in good faith on your part and...

Do I need a lawyer for my greencard process?

Read the instructions for each petition and application and application for a list of documents needed. USCIS.gov

Is there such a thing as an I-751 Notice of Intent to Deny? Is it mailed after an RFE? Before?

Notice of Intent to Deny can be sent immediately or after the issuance of an RFE. Depends on the facts of the specific case.

What happens to my green card application if my former wife and I have separate divorce judgement papers?

Your situation and the facts need to be straightened out BEFORE you make any request to the USCIS. There should NOT be two dissolution actions and...

How can I get a refund?

I NEVER suggest clients pay by money order for this exact reason. When you pay by check or credit card it is easy to show that the check was cashed...

Possibly, however once the process is completed up to a certain point you my be required to refile. An I-130 that has been acted upon may sometimes...

221 g - out of status

It would be necessary to review your immigration history in order to comment on your situation.

Husband conditional resident left country three months ago and I-751 was denied just yesterday. Did he lose his status?

Provided the denial of the I-751 revokes his status as an LPR with Conditions you are no longer obligated since he left the USA. HOWEVER, if the...

Sponsor for immigration ?

Yes and no is the best answer. Read the instructions carefully. Supporting documents should include evidence that you are meeting any child support...