Is £160 per month all you can afford? If so it will take you over 40 years to repay your creditors. This does not seem to be a sensible option.
That said, you will struggle to get an IVA on such a low repayment, and the key to resolving your financial difficulties appears to be within your home equity.
Assuming that you have not included the £40 CCJ within the £160, you could have then £200 available, which culd fund a lower ended IVA, however you will be required to raise equity in your property at the end of the term which therefore is just delaying the inevitable. It might be a better idea to consider whether a full and final settlement could be offered to your creditors either on the basis of a re-mortgage or sale of the property now. This could be done either by asking your DMP company to arrange this for you, or via the more certain route of an IVA, where you only need to get 75% of the creditors agreeing.
Regards, Melanie Giles, Insolvency Practitioner