Hhmmm.



If he got some savings then he can use that as a proof that he can support you. Or he can write a letter to british embassy stating the reason about this matter for sure they will understand.
I have a friend with the same story as u've got. I am the one who help them applying for her visa last year. British embassy turned her down for the visa coz of her husband bank statement/pay slip.That time, my friend's husband is losing hope that his wife will come over and share thier life together as a couple and when I spoke to him he said.... I am going to wait 6 months then we will try applying again. So, told the husband to appeal coz it's not cheap to apply again.So, in the end I helped her husband writing a letter for his appeal in tribunal discussing a meaning of life that they should be together.
So, I think that is the best way that your husband can do if time comes. God bless you and wishing u all the best of everything. Keep in touch.