Hi, everyone who is working will receive a P60 at the end of the financial year which is at the beginning of April every year even those in receipt of benefits will receive a P60u which is almost the same.
BTW I was in a similar situation as your husband I was in receipt of DLA and Jobseekers allowance at the time my wife made her application and it was approved as I could show I could adequately maintain her as my DLA was used in the equation as set in case law.
Hope that settles your mind a bit...