Hi lschrader, welcome to the forums
Can your husband get cheaper tuition since you work at a public university? There are lot of two year programs focused on manufacturing technologies (welding, machining, additive manufacturing). These are decent routes to a higher paying job (40-60k starting) and don't require massive spending on education if you go to a community college.
Does your position offer room for advancement? Hopefully since you are young, you'll be able to get raises and increase your income over time. You (or your husband) could also start a side gig depending on your interests (look around the forums for ideas).
Nursing or another medical related field could also be a good route to a decent wage for your husband with more flexibility in working hours.
There are lots of options, I would encourage him to keep working while obtaining a degree (if he wants a degree) and try to get either his employer or your employer to pay for tuition so you avoid going into student loan debt and avoid him not working for several years in the process.
Good luck!