Let's see what the school says.
There are separate issues here.
Online homework generally, a laptop and the printing issue.
Depends where the majority of students live and their prosperity as to whether all/majority of homework is set on line these days.
If many students are from families who struggle financially, and if the majority have no/poor access to Wi-Fi then presumably a school knows this and must adapt accordingly.
There are second hand laptops available. Op said she didn't want to buy one because she had been burnt/ripped off before.
But they are available, some for £20 on eBay. If opening post doesn't want to choose that option, that is of course her choice but people can't then complain that there are no options because there clearly are.
they may be that she doesn't want to. For whatever her reasons. Totally fine. But you cant then claim there aren't any.
There are also laptops available on interest free credit over 9,12,36 months so depending on how much money is available that could be an option.
The printing is very expensive for many of us, the inks are expensive. we all appreciate that. But, children don't need to print at home, they could print at school or some schools allow homework to be emailed to the teacher so no printing is required at all. Let's see what the schools response is re the printing issue.
so that separate out the different issues and address them on the time and I think you'll realise there are actually quite a few options here.
Op could sell the tablet and put the money towards a laptop. She may not want to, but she could, it's a choice.
There are options.