How exciting for you and your family!!!
I agree with pp to factor in future rate increases, hopefully it doesn't happen for awhile but at least you'll be prepared if it happens.
Pay repayments fortnightly or weekly.
Also agree with pp to pay extra off your loan whenever you can afford it, It really saves you in interest.
Shop around for insurance as you can get some really good deals out there and also if you combine policies it usually gives you a discount.
Have a look at what other interest rates are at other banks as quite often the banks are willing to give a better rate if they think you are shopping around plus they usually waive fees for other accounts etc.
Have a look at your grocery bill and see if theres anyway you can make saving there.
Buy in bulk your staple ingredients and toiletries,nappys when on sale.
Try not to use credit cards keep them for emergencys and use cash for day to day expenses.
Figure out how much you want to spend on grocery's each week and only withdraw that amount.
Bake your own biscuits and cakes etc for the family I find it works out cheaper for me to do this.
Plan cheaper going out ideas like packing a picnic to go to park or beach.
Buy your kids clothing at end of season and buy some in their next sizes, you can make big savings. Or if you don't mind going to op shops you can get really good clothing for really cheap prices.
Good luck, it will be so nice for you to bring your children up in your own home smile