aos with a us citizen unemployed and receiving food stamps

[sencere2015]

hello guys !
I am living with my fiancé over a year we are planning getting married and filing my papers !
my worries are :
she is a us citizen unemployed and living on section A government housing .
she receive food stamps for her 3 kids .
after getting married do I have to get green card approved after filing all papers.
she is ready to file all documents for me and her 3 last taxes which are below 15 thousands dollars a year.
please guys I need advice before filing

[inadmissible]

If you can get a joint sponsor, the food stamps aren't a dealbreaker.