Ok I think you are trying to have it all and it is a myth - you need to work out a balance for yourself. Some suggestions although not all will be possible
Kids are 4 & 2 they need interaction after nursery and school as they are then off to bed etc. Make a choice how many weeknight this will be..
Hubby needs your time (and you need his) make a date night however freq suits you and in the weeks where you don't have a go out night then have a stay in night where you have time together and actually relax.
CHoose the times you are available to staff - 24.7 is unreasonable. You are dispensible you don't need to be that available and they are not doing their job if you are. If they are not confident in taking the decisions make an effort to do that envourage them to tell you what the solution is, what the plan is or what actions need to happen - yu give the OK they will gain in confidence and soon be coming to you with this has happened I think this are you ok with that rather than panicked phone calls.
What are you doing to train up your replacement(s) what is the plan. Think about putting effort into this.
Consider rota-ing the availability of snr mgt so you get down time - can you share with a buddy mgr on decision making out of hrs??
Do you have any help in the home - just coming home to dinner cooked a couple of times a week or even some of these food boxes of meals they do could take some pressure off
Check how reliant you are on your OH - is he feeling put upon as you are constantly distracted? Off time would help on this front.
Could you have proactive check times with staff - prempting later calls etc.
I would maybe think about using a personal coach to make some of these things happen and be comfortable with the letting go.