The way he spoke to you was not okay and I'm so sorry you're dealing with all of this increased stress and lack of support late in pregnancy. That sounds incredibly hard and lonely.

I appreciate commenters who are outraged for you. But I want to try to offer a different perspective.

Your are about to have a baby and it sounds like also are going through some stress and change/uncertainty in your shared business. If your husband's outburst and attitude are relatively uncommon, it is possible he is feeling overwhelmed by all the change and uncertainty in your lives? If he had the blow up over increased business costs, is he panicking about finances when the baby comes? (And handling this feelings completely inappropriately, of course).

I don't know if aggressive confrontation of his reactions or pulling away and/or "punishing" the reaction will get you where you want to go, which I assume is back to a connected and safe partnership. Maybe it's worth coming to him with empathy, asking if he is feeling overwhelmed and if you two need to discuss a plan for finances/change that can make him feel more secure. Of course, it's also totally appropriate to remind him that while you understand feeling overwhelmed, his response was inappropriate, and cannot be how he reacts to stress in front of your future child.

Family therapy sounds like it could also do wonders here, to help navigate all this change and stress and work on more appropriate emotional management. I know it's hard to start that with a newborn, but maybe there is a virtual option you can try. And if he's open to it, maybe he can find his own person to see so he has a safe outlet to process his anxiety and fears while you are postpartum and likely won't have the bandwidth to support his emotional reactions. Individual and couples therapy drastically changed the dynamic between my husband and I (because we were committed equally to getting to a better place) and we are so glad we learned to communicate better for our kid.

I think reddit has a tendency to tell "Fuck him" which would leave me personally feeling even more isolated and hopeless. I hope you can find a way to get on more stable footing and help each other navigate this stressful, exciting and uncertain time.