You and your hu*****and should prepare an affidavit of support for your parents' visit to the US stating you will provide them travel and living expense during their stay. If your parents has the means to support themselvs, they can also prepar a bank statement to show to the consulate officer.
Based on the information you provided, they should not have problem to get the visas to join you and your hu*****and.
I wish you good luck and I am sure your parents will not have problem to get the visa.
Runan Zhang, Esq.
attorneys@runanzhang.com
