my husband is an immigrant from mexico in the US . I petioned for him and his 2 daughters. had a sponor who backed out. what more can we do?

I am married to him. We have two children together. Both under the age of 5. The children and I are american citizens. I am a homemaker, which is why we had to get a sponor.I did send an affadavit saying I was a homemaker and currently unemployed. I have a sponsor who will sign for him but not the girls. No one I know wants to be obligated with 10 years of financial responsibilty for the girls. All 3 have approved petitions. Both daughters already have visa app fee paid. Just not my husband.all paperwork has been done. May have to file for wavier. My husband crossed over 2 times and last got caught in 2009. The girls petitions where both approved in 2014. At that time one was 17 yrs and the other 15. At a loss of what else we can do to fix his case without a sponsor for his daughters. We haven't turned his affadavit with the sponsor yet because of the difficulties with figuring out what we can do to fix the girls papers as well. What other options do we have? Are our chances good?