You need to provide a bit more info.
If it’s QF Longhaul, it’s easy. SH is tough but anything is doable - just realise that you’re going to be making sacrifices.
The key is to have permanent accommodation in your base close to the airport so you don’t have to try and organise hotels every time. Ideally have an airport car in your base or good transport options (Skybus is ok in MEL) to get to work. Allow plenty of time to get to your base. You can afford to be more relaxed about getting home.
If you’ve got a bidding system try and bid for groups of days off so you at least get some time at home. Bid for overnights out of your base so you’re saving money on accommodation if you need to pay for it.
Use your sick leave.
Ensure your partner (if you have one) knows exactly what you’ve let them in for. Spend money to make their life easier. It will save you money and heartache in the long run. No point saving a couple of hundred bucks a week if they get so pissed off they leave you.