Hi lmg and welcome to the forum
You have various options available to you - including bankruptcy, IVA or DMP. If you can afford to pay £250 per month, and do not wish to declare yourself bankrupt, then either an IVA or DMP would be suitable - the only real difference being that in an IVA you pay for a set period and have the benefit of legal protection, which is not afforded under a DMP.
If you have equity in your current property, which you suggest, you will be expected to look contribute from this under an IVA during the final year.
The decision as to which is the most appropriate route for you can be complex, and is better discussed directly with an insolvency practitioner who can give you specific advice as to each option and the advantages, disadvantages and implications of each one. Advice is generally given completely free of charge, and if your husband is already in an IVA it might be sensible to approach his IP if he has a good relationship with him/her.
Regards, Melanie Giles, Insolvency Practitioner