There are no barriers on your partner going bankrupt again, and his discharge will again be likely to be automatic as his first bankruptcy was over 5 years ago.
An IVA, so long as it is being properly presented, ought to be no more hassle than bankruptcy, but the key thing that has to be present to make it work is a real desire to do it in the first place, coupled with good reasons.
If those factors are not present, then you ought to seriously consider whether you are doing the right thing.
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
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp