can you afford to hire a second helper may be for the first 3 years? I think after 2 children went to school, they are old enough to have only one helper at home. I see lots of my friends hire 2 helpers to take care 2 children. Mommy will be more relaxed and manage the children better.
Sometimes helpers are even better than in laws. Helpers will take our rules as orders. In laws will do their own ways. I would rather spend the money to have helpers watching my kids rather than leave them with my in laws.