Well, there are different kinds of online degrees. There online-only schools, schools like DeVry and University of Phoenix that are largely online but do have local campuses, and now, you can also get a degree largely or entirely online from many (if not most) established brick-and-mortar schools. The online schools still don’t have a great reputation (although I believe this is changing), in part because some (all?) of them have open admissions (you don’t need to have a HS diploma to enroll). For B&M schools, the admissions policies tend to be the same regardless of whether you take classes online or in person, but they may have programs for adult learners with different policies, or separate pools of applicants.
I got a BS in Computer Science from a state university, and did about 75-85% of my classes online. I could have done it entirely online, but I preferred to go in-person when I could. Mine was through a sub-college of the university specifically geared toward adult students, i.e. people who had either spent time in the workforce and/or already had a degree (as I did), who might also be currently working. You could earn credit for relevant work experience, and those classes that were in-person tended to be at night or on the weekends. They counted my general credits from my previous degree, so I just had to complete the 30 or so for my major. It took me just over a year, taking classes and working a little less than full-time. I really enjoyed the classes, and I now have a totally different career that I love, that I would not have been qualified for otherwise. Two years in, I’m already earning more than I was in my previous career. The cost of tuition was the standard in-state rate, a couple thousand a term.
The big deal for me, though, was the self-discipline it took to do the classes online. I find I really learn better with an in-person instructor, and would have done all my classes on campus if I could. Don’t get me wrong; I’m very glad the online classes were available, and some were great. Some sucked; just like the in-person classes, it depends on the instructor. But it’s an added challenge, on top of the challenge of the material itself. So for someone who hasn’t taken college courses before, I’d personally recommend taking one or two intro classes in person somewhere first, to get a feel for the task. There are often night and weekend classes at community colleges, and at the online university campuses, I’d imagine. That’s where I’d start.
Also, for various reasons, I had to get it done as quickly as possible. Unfortunately, that means that I’ve already forgotten a lot of what I learned. If I had it to do over again, I’d take more time with it. So, particularly if your husband has no specific career goal and timeframe in mind, there’s no need to pile on five or six classes at once. I’d say just start with one or two at a time, and ramp it up if it feels doable.
Good luck!