Loan interest is very low at the moment, around 2.7-2.9%, and to counter everyone loaning way too much, you need to have 15% of the loan sum in order to qualify. I can expect to pay maybe $320k for a apartment in Oslo, depending on how big and where it is. $320k would typically be >50m2 somewhat central, or 30-40m2 very central (those go for even more). I will need to have about $48k in cash to be able to get a loan at that price.
I also have some student loans, but I have basically my whole life left to pay them off at a very low interest, so I pay like $154 every two months or something I think. It is the best interest loan I am ever going to get, so there is no point just paying it down immediately even if I have the cash for it.
TL;DR: Paying for a mortage is better than paying someone else rent, and I do not want to live in my parents basement forever.
I never understood why buying a home is a good investment option since ROI is very low for a very long time unless you sell the house for a higher price or you make all the money through rent, which is probably never happening considering other costs that come with owning a home.
This article makes all the point I was going to write and some more.
http://www.jamesaltucher.com/2011/03/why-i-am-never-going-to...
This does not answer much of what you asked for though, since you are not in the same situation.
When I was in university I worked part-time, and I also got a loan&stipend from the government (as all students do in Norway). I usually made enough to save 40-50% of my income, which is why I have money saved up now. I made maybe $15k before taxes from work and got about the same in student loans. 40% of the student loans gets converted to a stipend if you pass your exams.
By the budget I have planned for when I buy an apartment, it will look something like this:
- Rent/Loan: 40%
- Groceries: 12%
- Utilities/Electricity/Stuff: 16%
And then there are probably more expenses I have not accounted for, but hopefully I will be able to save some money, but probably less than 32%