Good for you.I think you can do it.I have always had dogs and the kids came and I never thought twice now the kids and I have dogs of course the kids are older.My son is 12, daughter 19 and other son on his own with his family at 23 but I see no reason you can't do it.I think kids should be raised with dogs.My dear friend has 2 Akitas 11 and 9 and a 21 month old daughter and after she was born they rescued a 9 month old great dane /pointer mix and he is in puppy class with my shiba.Yup, the baby is in a back pack at the dog park and the baby is a young dog handler.Her first words were "sit,down,stay" She can crate the new dog and they get along beautifully.It can work.Of course they are extreamly experienced dog people but you are experienced too and I know it will work for you.Shiba's give us a world of experience- don't they.Good luck-don't let anyone deter you from your dreams and plans.You can do it.
Laurie