I'm coming to this very late, but thought I'd add my best wishes, and a couple of comments.
If I'm correct, your DH has been spending a lot of money on ebay (secretively?)? If so, have you mentioned this to the pdoc at the hospital? It might be that your DH has been experiencing hypomanic episodes (periods of elevated mood, but not as extreme as true mania). Overspending can be a sign of this. If that's the case, he might be experiencing bipolar depression, which involves a different set of medication (mood stabilisers). I don't mean to add even more stresss to your life at the moment, but, if it is bipolar, treating him with antidepressants on their own will not help.
I was initially diagnosed with PND, but antidepressants just made me very, very irritable/even more suicidal/hypomanic. There's now a query over whether I'm actually bipolar II (which is episodes of severe depression, combined with shorter periods of mild-ish hypomania). I've since had two mood stabillisers added to a low dose of citalopram and it's changed my life. I have minimal side effects and feel stable.
With help from a clinical psych, I've finally accepted that medication is going to play a big role in keeping me well. This was reinforced a month ago when I, with the assistance of my CPN, tried to reduce one of my medications. It ended in a massive crash, and admission to hospital. It was horrendous and hugely stressful for my DH (so I'm looking at this from the opposite perspective from you). However, I think going in to hospital helped to knock the episode on the head far quicker than if I'd stayed at home. It took me away from all the daily stresses, removed the constant need to try to keep myself safe, allowed me to sleep and generally took me away from 'life' for a while. I hope that's the case for your DH, too. I'm putting my life back together at the moment. I hadn't realised how bad things had become until I'd finally got to experience what 'normality' is.
Anyway, I hope things start to improve for you.