I need asistance for low income rent apartment..we are (3) medical care is 350.00( my income $32 000.00) I'M DISABLED

I'm disabled person..my income is $32 000.00 per year
We are (3)
I can't pay rent in San Diego,Ca plus medical care for us.
We live in Tijuana (mother in love house)
I need assistance for low income rent apartment
I had SENTRI LINE CARD FOR FIVE YEARS
HOMELAND PROTECTION..REYECT MY APLICATION RENEW....I'M DIABETIC...DAMAGE IN BOTH KNEES
I NEVER BROKE THE RULES WITH MY SENTRI CARD.
NEED HELP TO REVIEW MY SENTRI APLICATION RENEW CARD.
THANKS
GOD BLEES YOU