Christ love, Wales is the least of your worries. He's one of those men. Born in his comfort zone. It took fifteen years for him, as a young single man, to muster up the energy to start a part time OU degree fgs- not knocking the OU, but surely IT is the worst thing to do part time, it's always changing.
Why couldn't he have looked for one of those IT apprenticeship conversion things that some companies do? My friend did one recently, she did some sort of course with the company, the weekly apprenticeship pay was a bit shit, but she went from agency admin jobs to a very good job doing things with computers that I don't quite understand, in the space of a year. I bet he wouldn't ever have started the degree without your prompting anyway.
He wants to go back home and potter around in a little job and not do much. I know the type, there's plenty where I live, there's nothing inherently wrong with them, but they have no ambition, aren't very proactive, and are content to be carried through life.
I also feel like him suggesting he stay at home with the kids is a total red flag. I am always quite suspicious of men who are very eager to suggest that. Of course there are lots of lovely SAHDs out there, but there's also an awful lot who think it's an easy option. Do you really think that as a SAHD he's going to be proactive about going to baby groups, making sure toddler has a healthy lunch, going to splash time at the pool? He'll probably sit about and let his mum do it.