To apply for a permanent family visa , you usually need to show at least six months bank statements and be earning 10k per month (or 7k per month with company housing provided.

If your family are British passport holders , then they can get a visa on arrival at the airport.

You can apply for a visist visa once you have a valid RP

In some cases, if your PRO has good contacts , then you may be able to expedite the family visa process