Poor Yan79
You came in here to get advice which you got but, sadly, maybe not really what you actually ended up hearing. You must feel you've had the wind knocked out of you.
I think if you had been on your own (no children) this would still have been a risk because of the short time you've been together. With young children, plus a previous abusive relationship, you really need to step back and see all you stand to lose. Your hard-won independence, your emotional and financial security and, more importantly, the emotional and physical security of your children.
There have been so many posts on MN in AIBU and Relationships where things have gone wrong for the women (often with children shared or previous) and they're either trapped or homeless without funds. Have you read any of those threads? Or maybe you won't need to now after the majority of opinions you've had to your OP.
I'm unsure whether you are still planning to go ahead with your plans (I agree with the majority that you should not as you have so much to lose). Some of what you've said:
He’s said that he would make sure I’m ok. I know it’s only his word and I’ve probably been foolish.
Yes, he knows how much I’ll loose. He’s asked me to work full-time but it’s impossible.
Short temper as in shouts easily or gets stressed. Not in a physical way How will that make your children feel? And you when you hear him shout at them? In his house?
Obviously there have been a couple of concerns and that’s why I’ve posted on here.
More than a couple from some of your subsequent posts.
HE doesn’t make me feel scared, not at all.
What I don’t like is that he’s not approachable and he over reacts to any arguments we may have
The regular arguments you are having, in what should be the honeymoon period, should be a red flag for you. Particularly if your children are in earshot.
Generally my kids are very good but like them all they have their moments and he’s pretty intolerant of these at times and this is something that we’ve rowed about twice more recently
I’m doing it because I want to live with him and this seemed to be the only way...I feel VERY foolish now I’ve spoken on here. I honestly don’t think he’d kick me out but I suppose stranger things have happened.
You currently have no legally binding undertaking with him.
I just don’t know what I want anymore.
Please listen to what you've been told here, particularly from those who've been in similar situations and have come off worse.
You have done so well following Your last relationship. Why would you take such a huge risk not only for yourself but also for your children?
Where's the rush?
Why not speak to him before the holiday and be honest with him that you are not yet ready to commit? If not, are you sure you can be yourself with him whilst this is all whirling in your head?
Perhaps get some legal advice discreetly, for yourself or speak to Women's Aid for advice before committing to your current plans.
You've some tough decisions to make. Best wishes. 🌹