I suspect, the overwhelming majority of parents of young children go through this dilemma.
It really is a very personal decision for you and your dh.
Yes, childcare does take up a large % of income when they are little, but, over a lifetime, it is for a really short amount of time.
Once you come out of the workforce, it can become very difficult to get back in.
A lot will depend on what you do for a job - is it something that has taken training? Qualifications ? Experience? Is it something where there is always a shortage of staff ?
Then, how much you earn, comes into it.
How much you enjoy your job.
How much you enjoy / or dislike being at home 24 / 7 with small people.
Many people really want to be a SAHP and think it is worth stepping away from paid work for 10 years or so and keeping fingers crossed they will then be able to find something.
Others find that working is about a lot more than just the money, and, even when it actually costs more in childcare than the net income of one of the parents, it is still the right thing for that family.
Probably more people do continue to work, but for probably a small income over the childcare costs, but they are contributing to pensions, they are keeping up to date with work practices etc, and, over a 50 year working life, "being broke" for 4 or 5 years is a price worth paying.
Plus, you can look into tax credits etc, and things like moving your mortgage (if you have one) to interest only for 3 or 4 years, etc.