@baoap
This is the real issue, the sole responsibility to provide for your son. Where is his father in all of this, I presume he plays no part in DS's life. Let alone financially?
in some ways )if you're not together) this is the easiest option as you have total control over your & the child lives. But you also have total responsibility, it's tough.
I don't think there's any magic number that'll change that.
i think the best thing you can do really is write a list of your fears, then try to find ways to put things in place so you can worry less. Various kinds of insurance would help ?(life, terminal
illness, redundancy). Having named guardians for DS.
small things like accepting you and DS need & deserve to be comfortable & warm over the winter & that costs. Set yourself up best you can to keep the heat in & buy throw over heated blankets, dirt cheap to run, or oodies if that's more your thing. Cosy PJ's & bedding.
Accept some of your savings needs to be spent on being comfortable.
Big Hugs, it's not easy xx