I would counsel against an IVA for anyone only owing £7k, even as part of a husband/wife partnership, but have discussed this with creditors recently and got a mixed bag reaction to be frank.
At the end of the day it is your choice, but also the choice of the IP who you wish to approach to act for you. If you do get knocked back once, there may be others prepared to take you on as a client.
What percentage of the total income do you and your wife earn?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
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http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp