DH needs to grow up a fair bit chick. You are the only one reliable here! It's always everyone else's fault that things go wrong and there is always the threat of his depression hitting again.

If you did end up borrowing the $$$ from your dad, I suggest you ask him to step in and have a talk about it.
I would have issues buying a business someone only had for 3 months - selling for no good reason.

Having your own business means low pay for at least 12 months whilst you build it up - he needs to work hard right now, not just throw in the towel cos its too hard. HE wanted this.

Hope you get somewhere with him xoxoxo