Rule #1, don't live like a refugee
If you want to go somewhere, then go. Forget about the comparisons, they are just pointless.
If you are thinking milk/bread would be cheaper (*) back home every time you go to the supermarket, then you're going to have a hard time of it.
Life is not a spreadsheet where you can weigh up the cost of a BMW vs being able to go to the beach.
Footnote (*): They are not cheaper. They are subsidised. That means you just pay for them somewhere else. Australia has the second lowest agricultural and food subsidies with NZ being the lowest.