MyKingdom - absolutely!
I've worked on and off before and in between having dcs. I enjoyed my jobs but never really had or desired a 'career'.
DH has his own business. It is very successful and he loves what he does even though the hours are long, he often has to deal with issues in the small hours and is never really off call.
I'm now a sahm, youngest is last year primary. I do the house stuff, bills, running dcs around. Older dcs often need help with school, work and uni issues which I can deal with quickly and easily.
If I had a job DH wouldn't be able to give the business the attention it needs. He is fully aware of this and sees the business' success as 'ours'. I often help him out with market research, wording tricky emails, book keeping etc.
I'm always busy. I'm doing OU because I have a need to keep learning. Our dcs have the benefit of a parent on call. Our parents and aunts/uncles are ageing and I can see they will need help before too long. I'm also kind of looking forward to grandparenthood. We had very little help when I our dcs were young, I'd love to be a support to ours when they become parents.
Bringing value to a family isn't just about bringing money in.