How can I encourage my husband to go back to school?

My husband has a pretty decent job he def makes more then me about 20 bucks an hr. But I am trying to encourage him to go back to school. He works in a factory and he's good at his job but considering it is a factory it might not be there forever and I know he doesn't want to work there forever! He is still young only 28 and I am really trying to encourage him to go back to school so he doesn't have to slave for the rest of his life. Recently he took on a weekend shift job that requires him to work 12 hr days for only 3 days a week. So he is making the same amount of money but working much less days. I told him it will be so much easier for him to go back to school working less days (Before he was working 6 days and making the same he is now! Along with the weekend job came a raise) He acts like he really wants to do it but always says he doesn't know what he would go for and I think the 2-4 yr time frame scares him. He is really awesome at computers and I tell him he should go for something along those lines all the time, He says he would also like to maybe do electrician work. We talk about it but I know when it comes down to it it would be really hard to get him to go. He would def need some pushing in the right direction. Any suggestions on an online college or something that he could do that wouldn't take forever or something with computers? How can I encourage him? I'm a hair stylist but due to the fact that I qualify for a large amount of financial aide I am already enrolled in cles. I don't know what I am going to go for yet but just get the must haves out of the way. How can I help him realize that going back to school and getting a college degree is the only set way to a good future and would be the best decision he could make? And the best time to start is now!