H4 for spouse and child of H1B candidate

Hi there. We are South African.

This covers H4 and H1B visas.

My wife has a job offer in the US and is willing to sponsor her an H1B.

Once her H1B is approved (I129 petetion, I129 petetion receipt and I797 approval in order), will my wife need to pay $190 for an H1B visa stamp too?

For me and my daughter to file for H4, is the cost $190 each and require a DS160 each?

Will these H4 visas get stamped at the consulate when we go for our interview?

Will my wife (H1B), my daughter (H4) and I (H4) all book an interview at the same time for visa stamping?

I look forward to your response.

Thanks

Paul

Once her H1B is approved (I129 petetion, I129 petetion receipt and I797 approval in order), will my wife need to pay $190 for an H1B visa stamp too? Yes - it is a local fee to be paid by primary applicant.For me and my daughter to file for H4, is the cost $190 each and require a DS160 each? Yes that is correctWill these H4 visas get stamped at the consulate when we go for our interview? YesWill my wife (H1B), my daughter (H4) and I (H4) all book an interview at the same time for visa stamping? It is always a good idea for family to apply together.