Moving back from Australia

I’m originally from the uk. I’ve lived in Australia for 8 years and have citizenship here. My husband is here and we have a baby together.

I’m setting up to move back to the UK in 1-2 years. I have the following questions if anyone can clarify.

  1. I need a job that pays £35k prior to us submitting the family visa application. Will a job offer suffice or do I need an actual pay slip?

  2. I need somewhere for us to live before I apply for the visa. I’m assuming I can just use my parents address?

I would much prefer to have the visa approved before we move but it seems that is difficult. We don’t meet the savings threshold. Our money is all tied up in property.

If we all travel together and apply for the visa when we get to the UK - can my husband and child travel and stay in the UK under the 6 month holiday visa? Or do they have to wait in Australia?

Thank you for any help.