M.S.
I have 3 kids a 3 year old, 20 month old, and a 5 month old. I run my family business and my husband is an engineer. This is how we make it. My husband helps equally as much as I do if not more since I am breast feeding right now he does more of the housework and laundry. We hire people to clean the house, mow the lawn, etc. so we can spend that time we would be doing that with our children. We prepare for the next day at night by getting clothes laid out, lunches packed, breast pump cleaned, etc. I try to do all my errand running at lunch and so does my husband so we have more time at home with them. We take family vacations, make sure they have lots of interaction with grandparents, cousins, aunts, uncles, and we go to the lake with my sister's family and my parents almost every weekend during the summer. Right now I take a bath with my girls and my baby son and I get some time spent with them and we have a great time in the tub. We always have dinner together as a family with the TV off. I have done some of those dinner things where you make them and freeze them or we do lots of crock pot cooking during the winter and grilling during the summer.
As far as remorse I think everyone has it. I too would like to maybe cut back to 4 days a week. Right now it isn't feasible but maybe next year. I just think well I was raised by a working mom and my husband was too and I think we turned pretty good. My kids are happy and my husband and I are happy so that I think is a good thing and all that matters.
Well hope this helps.
M.