Mo,
a ) you have got a long way.
B), providing him with the detail provides the evidence.
C) sell the wine?
It is presumably a joint asset...but make it clear you are only selling it becUse the children and you are desperate.
D) do you have a spare bedroom, could you get a lodger in while he is away?
E) birthdays can be expensive, but can you cut back a bit? I know it sounds exactly what you don't want to do, And why you are fighting, but if a choice between food ( basic), clothes/ uniform and party, you need to appear reasonable.
F) ask the SH mediator what you have to do to get access to his financial records. V important. You may need some sort of enforcement order. There's something v odd going on here. He's either a sociopath and needs putting away, or he is doing something odd with the money.
Finally, breathe, visualise, cherish yourself, write a few bullet points on what I shall enjoy in three years time , 2 years time, 6 months time...


