What people do for their DC is going to vary significantly depending on their individual income, outgoings, and attitude towards supporting DC.
My DC1 is hopefully heading off to university in 18 months' time.
I'm divorced, which has messed up the original plan for university finances.
Due to a relatively recent pay rise (for me), DS will only get the minimum loan. I'm by no means rolling in it. We live in London, I have a second DC, we're a single-income household. On paper, my new salary is pretty reasonable, but it doesn't go far in reality.
Apparently, XH has told DS not to expect anything from him. XH was earning more when we split than I earn now and lives with his partner, so has someone to share household costs. No maintenance to me as 50/50. So I feel rather 🙄 about this.
Anyway, DS will have some savings, mainly thanks to my parents. According to my research, living costs are going to be £12-14k per year. This will leave a shortfall of at least £7k per year between the basic loan and that figure.
Since getting my promotion/pay rise back in the autumn, I have been putting aside £200/month. I'm hoping to be able to then give that amount directly to DS once he goes to uni, plus top it up from what I will have saved by then. So maybe £300/month. By my calculations, even with that and if DS splits his savings into a monthly amount over the course of his degree, he will still need to get a job to get up to the £1k/month level of income students need to live in.
Based on your monthly spending on your DC, you sound like you have more disposable income than me. Honestly, in your position, I would save whatever you can towards university. But that's where attitude comes in - I would cut back on everything for myself to try and support my DC. I'm hoping to do some more training and progress further in my career by the time DC2 is ready for uni in 4 year's time so that I can help out more.
I didn't pay for my degree and it really saddens me that my DC are going to be saddled with massive debt because their parents can't afford to fund university.