Just playing devils advocate here...
Inequality in a relationship can kick in when one person (woman) is the SAHP. Domestic work never stops and the paid worker in the partnership can become resentful when the house and kids aren't all in order when they walk in the door, despite SAHP best efforts. It can become a real source of conflict.
The working parent can feel entitled to have all the down-time because they 'work'. Have discussions before making the change to be clear that even when one person has a paid job they still need to come home and do the 'after hours' shift too, not judge and criticise, and also that you both are entitled to split weekends and evenings for time to relax.
You can become isolated as SAHP, lose your sense of independence and being treated as an adult by other adults around you, this can take it's toll on your self-esteem.
The paid worker can start to feel entitled to control the finances, so keep an eye on that. It can creep in in very subtle ways. Establish that it is 'shared family income' and that you are wearing the disadvantage of being outside of paid work at the moment. That you manage the bills might mitigate that possibility.
It is more difficult for the unpaid worker to leave the relationship, this in itself leads to a power imbalance so SAHP has less leverage if they become unhappy with aspects of the relationship. Again, this can influence each person in very subtle ways that can be hard to recognise. It shifts the power balance. Think about if you are able to influence him with your opinions.
Consider the power dynamic is in your relationship with brutal honesty. How are decisions made? Whose opinions tend to prevail across each area of life - socialising, raising the kids, housework, spirituality, extended family? If his 'culture' tends to dominate these, or he has any patterns of making communication difficult, then I would definitely reconsider leaving work.
How do you communicate with each other? Do either of you use conversational control tactics - silent treatment, getting angry, sulking to end discussion? If you have any difficulties in communicating then this should be addressed before ceasing paid employment.
Not saying this is going to happen to you, obviously know nothing of your relationship - just raising the possibilities you may not have thought of.