OP, sending you
.
You’re right we don’t know him and it’s not the full picture. It sounds awful though - damp untreated (why?) a dishwasher you’ve bought unplumbed in (what reasoning could there possibly be for that?).
Whatever else he is, he has serious financial issues that are causing problems.
He needs to address those.
It is not ‘princessy’ to insist on that.
And as to your business, that is your decision:
He is not happy for me to take on the expense of paying for outside help. He would prefer me to try and at do the minimum, hope that they won't notice and then return fully asap.
It’s got nothing whatsoever to do with him how you run your business.
You make the decision, you forecast your income based on your decision, then you inform him how much you can contribute to living costs whilst on maternity leave. Not the other way around.
And I don’t know why you have to shoulder the cost of big ticket items like a pram.
He’s being absolutely awfully unreasonable if he’s not being abusive. If you believe he’s not abusive then you should be able to lay it all out and tell him how awfully he’s behaving. And he should listen.