Hi jcc and welcome to the forum
Normally I would say that this is a possibility for someone with the level of debt you have, however with such a substantial percentage with just one creditor I feel it would be better to negotiate a settlement, or a basis for ongoing payments, with them directly. Who is the bank?
As you are probably aware, to get an IVA accepted you need to achieve a 75% majority of voters at the creditors meeting. This creditor holds 82% of the votes so will have the decision to say yes or no. Best they be consulted first before any decisions are taken.
Your car will probably be safe under either option, but make sure you maintain the HP payments.
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