Sorry your IVA hasn't worked out for you. Firstly the OR should have no opinion on your hubby moving out and will not look badly on it, it's personal between you and your hubby(as long as you haven't just come to the decision for financial reasons)
You will need to contact your ip to discuss your situation, they may have funds set aside for br. You will need to apply to the court for a reduction in fees, it's only the court fees that can be waivered, not the OR fees.
You will need to put down the total of the debts, not what would have been paid in an IVA so when you contact your ip you will need to get this from them, I'm assuming they will have the totals.
The OR can take benefits into account when calculating income, it really depends on the OR. Any income is subject to being included if they see fit.
You should be ok with the cashminder account, we had our's when we filed and it wasn't affected in anyway.
It's nice to be back......