My maternal Grandparents never seemed to have much money and only lived in a tiny little house with outside loo. Grandad always worked hard and Grandma did shifts in a local chippy, but I never remember them going on holiday at all. Grandad was dead by the time I had grown up, so I couldn't treat him sadly, but I used to buy Grandma nice things at birthdays and Christmas and often took her flowers and treat her to some tripe (which she absolutely loved) every Saturday lol. Of course they are long gone now and I always wish I had done more - memories eh, they can sometimes break you.
How lovely that you could help your Mum in that way jj.