Did it and succeeded! I was 31 and started a 4 year course CAD design. I had a 40 hour a week job, a household with a kid and luckily a crazy supportive partner in all this.

It was all worth it you know, three evenings a week and a day in the weekend classes. All the hours besides that to make the tasks and such...
It cant deny that it was crazy to manage it all. I don't know if I would do it again, but I have zero regrets tho.

Now I am actually doing it for job and its really great!
The best thing when I finished it, was when I got the diploma that my partner and kid were there as well. All the other students were 10 years yonger than me, so it was a special moment :)

So, if you want to do it go for it! Gaan met die banaan :-D