Hi Snowflake,
Neither David nor Melanie are around this week, but should be back on again soon.
You are better seeking a company who will give you advice on all your options, not just one.
Normally £200 is a benchmark for an IVA payment, but I believe David's firm has done them for less. Not sure about Melanie.
It is not guaranteed that you can get interest and charges frozen in a DMP, and if you only have £150 per month, that's not going to pay all your debts off over 5 or six years. It will take a lot longer.
You should speak to several providers. Visit
www.iva.com for a list of companies and reviews. Make sure you ask about upfront fees. Some firms charge, some don't.
These firms will go over all your options with you and advise as to the best one for you.