You won't have any trouble with your creditors in respect of the cash withdrawals. I suspect they are not overly large, and as you say it is also being spent on housekeeping etc.
The loss on internet bingo will also not be an issue. It equates to about £200 per month. I cannot foresee any problems with your IVA, due to the gambling.
Provided you put forward a realistic offer to creditors it sounds as though you have a good chance of getting it approved. If you call any of us "experts" on this site, you should get some sound advice on the way forward.
Kind regards
Brian
Finebridge Ltd
22 Laud Street, Croydon, CR0 1SU
0800 180 4212
www.finebridge.co.uk