Could you post how many creditors he owes to, is it just two?
I've never heard of Money Expert but perhaps one of the experts have and can help you, I had a little look on
www.iva.com but they aren't listed there so maybe they refer you to an IP.
Personally I would contact Melanie Giles who regularly posts on here, you can get her details from the Meet the Experts page. Your husband needs to know all of his options as his debt is relatively low. Initial telephone call will cost nothing but may help.
To answer your question re his credit history, it will be affected for 6 years from the date of the creditors meeting if he does an IVA and if it is approved.
Get your husband to give Melanie a call to go over his situation, I'm not saying you shouldn't stay with the company you have contacted but it doesn't hurt to get a second opinion.
I'm not an expert so this is just my personal opinion.
Let us know what happens, good luck, Viki X