It's normal and many who do FP don't face any processing delay. But if it's goes for Security screening which can take up to an year to complete then you need to wait. FP results in your application being marked as non routine too.
It will be a group application.
You can do for yourself and daughter from one account.
Wife will be a separate account and then you invite your wife to make it a group application.
Your daughter can be part of your or your wife's application.