I would tell them. We told all of our family as soon as we found out and my husband was out of work at the time everyone supported us. They may get upset the longer you wait.
Tell your boyfriend that when the rest of the family learns that so many family members knew, they will be angry that they were shut out. The job issue and where you are living should not factor into it enough to make you keep it a secret, unless the family is so judgmental that you are all going to get into a screaming fight over their opinion of his ability as a provider.
Stuff like that is big for guys. You just need to reassure him that what everyone thinks doesn't matter. Its your lives you know? I'm sure he'll be working before the baby comes so who cares what everyone thinks no one is perfect.
Thanks guys. I got him to tell a few people, not all, but it's better than nothing.