Firstly I find it strange that you were put into a DMP in the first place! IVA's were made for people who are self-employed, and to be advised not to do one because of that seems bizarre to me if that was the only reason.
Your husband's mileage to visit his family would be allowable in the IVA - just make sure that whoever you choose to represent you takes this into account.
An IVA would appear to conclude your debts at a much earlier stage than the DMP you are currently paying into - it would be interesting to see exactly how much your debt has reduced over the previous two years, to give you some idea of how long it would take to pay your creditors off in full.
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