Working or Staying at Home with 2 kids?

Courtney • Mom of 3 year old boy, married 5 yrs, now expecting a girl in July!
I have been working and in school, but took a year off when my son was born. Now I am working but it has been tough missing time with my son. I am 22 weeks pregnant and was planning to quit work and stay home for a year or more to be with my kids. My boss is now offering me loan repayment and help with liscensure, but this requires a 7 year contract and at least a year more of commuting 100 miles a day. Money wise I know this is a good opportunity, but I love my kids. Any advice or experience with work versus staying home would be great!