Hardship letter for i601a waiver

 Description show an idea on how to write a hardship letter for my husbands i601a waiver, we have been married 2 yrs known each other 9 and lived with each other 8 years. He is from Mexico and has 2 children in Mexico by a prior wife.  With 6 children by prior marriage and subsequent relationships, four of the 6 living with us. The eldest son lives on his own with his wife and child, the youngest daughter lives with her father & comes every weekend as we share joint custody of our 11 yr old daughter. Being a 41 yr old American citizen who is petitioning my husband to get his green card here in the US so we can continue our lives together. I am disabled and my husband is our sole provider so if he isn’t granted a waiver and made to go back to Mexico there is always a bigger chance he won’t be allowed to return to the US for up to 10 years. I suffer from multiple psychiatric disorders such as manic depression severe, & bipolar