It's all mute until op looks at essential outgoings.
Essential amount she needs for petrol, mot/insurance. Looks at all bills and see where she can cut down eg moving to octopus energy.
School lunches, clothes for dc, every essential expenditure she has to make needs to be pinned down, weekly food shop. Pinned down then see where she can save esp on food as Barbara mentioned.
Then she has her left over money.
At the moment it seems she's wildy spending without knowing where its coming from or what it's robbing eg fairground rides today.. Unable to afford petrol tomorrow.
I'd strongly suggest op you take the simple route until you do monzo etc.. Do you essential outgoing and see what's left.. Draw it out in cash and put that cash into labelled envelope.
Week 1/2/3/4/5.
Week one petrol £20. Week one food £80. Week one extras unexpected £10.
Holiday £5. Xmas £5. Bdsys £5. Car £10.
Or whatever your left over money allows you.
Then when you do your selling of items you look at your envelopes and decide how to spread that 100.
Probably £70 into car fund... And £10 each into Xmas and bday etc
If you havant used your weekly petrol allowance it carries over for petrol. Same with the others.
Once you see it in cash in an envelope it steadies the ship to begin with.. Helps mentally to see and deal with cash... £80 food.. Helps to do a cleaner shop because if you have £10 left that carries over to next weeks shop.. And if you can save £40 in a month... Buy some treats or take away or put it towards one of the your other pots eg Xmas... For Xmas food treats..
It's pointless to try anything until you've divided it all up from spending first because it's going in the wind...
It needs to go into pots.
Every extra money dh and I now get in it immediately gets divide up into all our pots.
It's a way of life now.
But it's taken the worry out of day to day living because if I need a new tyre.. I'm not going into my over draft.. I just go to my car fund envelope and take what I need to break the back of the cost...
If I see toys dc want in the summer sales, I can buy them from my Xmas envelope.
We did a year of pruned back living to give the pots a start and brought yha membership, they do 25% off a few times a year so can get away, self cater and it's cheap.
But all pointless until you say we definitely have x amount each month left from essentials.. Then second essentials like dc shoes clothes school stuff..