I grew up in an abusive home op, please for your dcs sake at least whether you think he's an abuser or not, organise yourself and leave ASAP
I left home at 17 to escape, brother was same and sister lasted a little longer, parents still married and mum is now dads carer which I hate she deserved so much more.
I'm 48 and still dealing with the mental health ramifications of such an upbringing.
He IS a typical abuser, just cos sometimes he's "nice" doesn't negate the abuse. Most abusers are like this - nice sometimes horrible the rest - cos otherwise their victims wouldn't stick around.
My dad is funny, generous, intelligent, thoughtful and interesting to talk to
He's also manipulative, aggressive, hurtful, cruel and miserly with mum.
Take the support you have available to you to get out in the safest way possible.
Living frugally in a calm happy home is worth more than anything money can buy.
Going on what pps are saying about identifying as a victim of dv is true too. Outside of her marriage my mum is an intelligent, funny, kind, generous, strong, capable woman. He's ground her down over nearly 50 years of marriage I know through her it started small and seemingly benign behaviours that increased over time. He didn't actually hit her until I was around. But the red flags were there before they married. I'm not sure if they'd have married were it not for me (shotgun wedding) either. That's tough to live with.
Staying "for the sake of the kids" when there's abuse makes no sense whatsoever
Please give your family the peace and happiness you deserve