A little more explanation maybe, about the payment and visa etc. You could go a lot of different ways here, sure does put in laws text about your H and his homelessness in perspective...
Seems that H has know for a while he may not make this payment...
If between today and tomorrow it's not going to be "fixed" and obviously H knew it was coming due, then he is not coughing up, is he?
Give me some background on the payment, what is required etc and maybe I can offer a path you could take.