An IVA is unlikely to be an unsuitable solution for either of you, because Black Horse have a policy of rejecting most cases where the debt is higher than £7,500 and, as other posters have stated, your wife could not present an IVA with just one creditor.
In a bankruptcy scenario, the OR will review both sets of income and expenditure to assess whether Income Payments Orders are viable. The OR tends to work on the basis that you share housedhold expenditure equally,and therefore you ought to firstly identify whether your wife could afford to avoid bankruptcy and continue to pay her one creditor, perhaps leading to just you declaring bankruptcy.
Catallus makes an intersting point, and one which is very close to my heart at the moment, in that there does not appear to be a consistent approach with regard to the way the Official Reciever views bankruptcy cases - and this therefore makes it quite difficult for professionals like us to give definitive advice as to what would happen under bankruptcy proceedings. Even our resident bankruptcy experts - Skippy, Scaredkez, Zoe and Mish all have different things which have happened to them. And the one thing to remember about applying for bankruptcy, is that once it is done you cannot change your mind, so careful consideration should be given to the way forward before you make your application.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk