Hi - I did answer your post on Friday and had concerns about affordability.
If you are intent on putting an IVA forward, why don't you try it on the basis that you will not touch your husband's equity, and if the creditors demand it then you will withdraw. This is unlikely to cost you anything, you will just need to persuade an IP to take your case on such basis.
My view is that your husband's equity is his asset and you have no call over it, unless you have made direct contributions towards the deposit monies or any property improvements. Trustee's in bankruptcy will rarely pursue such actions unless there are big numbers involved and they manage to persuade creditors to pay for the costs of Court action.
A DMP is unlikely to be completed within 6 1/2 years, as the creditors will continue to charge you interest. Lily's advice to discuss the options with your husband is a good one - perhaps an overall equity release now might get rid of the debts in one swoop, and you could then use your £400 to pay your husband back.
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