Hi ele
So your combined debts are £119,000, and you have a disposable income of approximately £600.  This would enable you to offer £36,000 to creditors over a 5 year period, which after costs would give a dividend return of 23.5p in the £.  Most creditors operate to a minimum of 25p in the £, so if you were to increase your payments slightly to £630 IVA's could possibly be accepted.
Do you owe anything to HSBC or Northern Rock, as these creditors have higher minimum dividend expectations.  If so, can you post me a full list of your creditors so that I can advise further - and identify which are yours and which are your husbands.
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