My story sounds identical to custardo & Cam. Went back to Uni full-time 10 years ago. I was working in a Call centre when I started, & they let me rearrange my hours to fit in with the course- I just changed each October. I worked 16 hours a week throughout the year, & had a casual waitressing job (as & when required) on top of that, for light relief.
I studied History & Social Anthropology. It was a module course, so each year I just picked those modules I liked the sound of that were taught the day I wanted to go in. I did have to skip some that would have meant going in for just 1 lecture, but did end up taking a couple of courses I wouldn't otherwise have chosen & thoroughly enjoyed them. Each class had 1 lecture & 1 seminar a week, and I didn't miss any.
I made the mistake the first year of allocating all my time, so I had a couple of days where I had lectures then dashed off to work. Not good. You need time to go to the library, & time to go for a coffee with the other students. What worked in years 2 & 3 was 3 full days at Uni & 2 full days at work. By the last year my youngest was 4, and had 3 mornings at playgroup, collected by grandad, one full day in the Uni nursery, and 4 afternoons at the local nursery. He is a very gregarious & sociable child!!
I did (& do) have a very supportive DH, who took the children out for day-long trips for every essay deadline. I would leave it till the last minute then spend literally all day Sunday from 8 am writing. I had to produce 20 essays a year ( 4 modules, 5 essays each), so it wasn't every weekend.
My children were 2, 4, 6 & 7 when I started, & I'm glad I didn't wait till they were older, like my mum told me to, or I'd never have found the time. I got a 2:1, which I was very proud of. My only caution would be, don't bank on it getting you somewhere (although, if you're planning to do teaching that won't apply). All the "graduate" jobs I applied for wanted 23 year olds, so I never did actually improve my job prospects.