OP, mention a forensic accountant to your solicitor.
It could be money well spent.
You have been abused and financially controlled by him which is a crime.
Look up Coercive control and see how many boxes you can tick.
More and more women are reporting it.
It is widespread among the population.
Police stations are becoming very used to women walking in and asking for advice about it.
It's a serious crime.
Stay strong and remember this is a very abusive man whom has committed crimes against you.
Men find this a huge shock when faced with the reality of a report made to the police about what they see as their right in the family home.
The more information you gather, the better.
It is happening in all socio economic groups...bad controlling men everywhere.