That's a very unfair attack on Lweji , Jabbsy.
'Just your way or high way' ....
.... errr no, that's not what Lweji was suggesting at all. And it's a bit rich to accuse someone of that attitude when it's exactly the attitude the OP's husband has adopted.
At no point has the OP herself said anything along the lines of refusing to look at alternative ways forward, or demanded that she remain a SAHM for life. Her understandable objections have been in response to the way her DH has handled this .... by making unilateral decisions that affect them ALL.
So far he has no concrete plans ..... nothing in which the OP can pin her trust. Is she supposed to 'trust' thin air ? Her DH may try very hard to make a go of his business and/or to look for other work if it fails but what if he can't find any ? He'll have got rid of a guaranteed (as much as it ever can be) income for a pipe dream which, if there is any substance to it, he hasn't yet shared with his wife.
In a so-called partnership both parties are supposed to have equal input, both parties are supposed to discuss their future plans and how to realise those, both parties are supposed to confide in each other if they find themselves increasingly unhappy in the here and now so they can both work out what to do for the best.
In this partnership, just one of the parties concerned is making far reaching important decisions all on his own. It's irresponsible and bloody contemptuous - as if his wife's feelings and opinions come in a very poor second place to his.
No-one is suggesting that 'her way' must remain THE way forever. The pair of them may well have to compromise quite considerably in order to reach a place they can both live with .... maybe neither of them will be 100% happy but being part way there is a hell of a lot better than one person being 100% happy with the decision they've made all on their own and the other person being 100% Unhappy because their so-called partner has just dumped all over them.
One person's happiness shouldn't trump the other yet this is exactly what the OP's DH has done to her when she justifiably feels very vulnerable.
OP - I'm very sorry he's done what he's done ..... the financial irresponsibility is bad enough but it must also be quite a shock for you to realise he holds your opinion in such small regard.