Hey Markym,
Just be as detailed as possible - include past pay stubs, explain your situation now, and what is your plan when your husband is there, how you will support him. It can also help to show if he has qualifications or experiences that he could use in Canada, explain that. Get a letter from your parents (if that's the case) stating that you can stay with them until you are more autonomous etc... CIC wants to see that you have a plan, that you have thought about how to support you and your family, and that you will not go on welfare... and that should be good.
My partner was approved as a sponsor even if he has only been working 5 months in the last 3 years as he was a full time student outside of Canada. He has some debts to pay for his studies, and he still got approved to sponsor me - he included a detailed plan on how he will look for work, what he can do, what I can do as well, etc. He got approved within the "normal" approval time (92 days at that time!) and without any extra questions.
Good luck!
Sweden