As a US citizen, you are allowed to sponsor your spouse and your parents [when you turned 21]. You will be required to execute an affidavit of support to show you have the required annual income to support your household size including the person you are filing papers for. If your income is insufficient, you have the option of including a joint sponsor.
However, if your income is insufficient for your household size and you do not have a joint sponsor or co-sponsor, the Green card application will not be approved. Getting married will increase your household size but if you have sufficient income, then it’s not a problem. If my office can be of further assistance, feel free to contact us to schedule a consultation. Please note that the above content does not constitute legal advice nor create an attorney-client relationship. Good luck with your case.
FAQ Source: www.Answers.Justia.com