Hi Neilb
Probably your realistic options are IVA or bankruptcy, the third option, debt management, would involve paying off all your debts over an extended period, but given how much debt you've got it would take far too long.
Your wife's house would not be affected by any bankruptcy on your part, as you are not one of the owners thereof. However, in either bankruptcy or IVA, the net proceeds of sale of your own house would be expected to go into the pot.
If you undertook an IVA, this would be a 5-year repayment plan, you would pay what you could afford to pay over the 5 years, and as long as you stuck to it, then you would be free of debt at the end of it.
Although you mention that you would like to keep your wife out of it, as you live together as a single household, your wife's earnings would need to be taken into account when working out the domestic budget to see how much you could afford to pay into the IVA.
Do you know roughly how much per month you could afford to pay towards your debts ?