I vote for at least 2, 3 can also be alot of fun. Seeing them interact together gives alot of satisfaction and precious moments. You won't regret to have 2 for sure.
If my daughter is 5 years old, is it too late for me to have the 2nd one? Another problem is that no one helps me to take care the 2nd one and I haven't employed any maid. How can I solve this problem?