How to work with a negative spouse


I own a business with my husband. He is the technician, I do everything else. So I need to sell work/customer service/books…, he needs to perform the work – in a nutshell. He has wild mood swings at work and home. We do not actually work on top of eachother as I’m in the office, he in the shop – so some separation. He likes to watch his netflix at lunch so we seldom talk then, he doddles during the day so typically stays late at the shop and then eats late and watches his phone while the family watches a show before bed on a typical night. He has been in a real rut and that impacts what I do for work and our ability to bring in money. I hate having to be dependent on him, but we have to resolve a few logistical items before I can bring in another tech.
I can appreciate that he is a one man show as I am the same running the business, managing the kids and home. He has recently gone on anxiety meds and it’s helped mildly at best; not sure if he is still taking them. I’m struggling with how to interact with him when he refuses to do his work. I can set up models to handle me, but this complex husband/wife dynamic/business partners makes it even harder for me to know what to do here. He’s verbally abusive and his voice cuts into me like a knife when he yells. I can be gentle and inquisitive to check up on progress (as I’d do with any other tech) as I have to communicate to customers and need to know where things stand in the shop to do so. This necessitates talking but on days like today where he is emotionally down, I ask if there’s anything I can do to help and it’s yelling, screaming at me or if our kids are around how they don’t need to be out there, treat him like a child, ask more of him….. Plain and simple, we have a job to do and if he were an employee he would be addressed for lack of performance and poor mindset if not fired. I don’t talk like that to him, but I’m left dealing with customers and trying to save face and keep customers with extended lead times…. If I can’t control another person, what ideas do you have for this situation? (regular or biz coaching??) I know that my husband has demons from his past he hasn’t dealt with, refuses to and they rear their ugly head at us when he feels overwhelmed but I’m tired of walking on eggshells – we all have jobs to do……