Everyone has given good advice. I will add that you can also take advantage of lots of free or low cost entertainment. Parks, libraries, schools, etc. often offer family activities. Also many restaurants have nights when kids eat free. We take advantage of those nights for eating out! If we all get water to drink instead of $1.99 drinks my family of 5 can eat out for $20-$25 dollars.
Parenthood: That state of being better chaperoned than you were before marriage.
A parent's love is whole no matter how many times divided.