People teach in Korea for several reasons. If you want to make some money you have to:
1. Get 2 million/month standard contract for 120 teaching house a week (no weekend work. It is still not a big salary but cost of living is low in Korea as are taxes.
2. Get the apt. free with the contract.
3. Keep your expenses down. Don't buy a lot of things you cannot take home furniture). Learn to live simply.
4. Do over-time and/or teach a bit privately on the weekend.
5. Put your money in the bank at 4% interest. It is quite a good rate and consider this a bonus to your income.
6. Don't leave the country and the apt. till you get your return ticket money and severance pay from your school.
7. Stay healthy.

There are lots of wonderful things to see and do here, food, travel history. I year is not enough unless you are very energetic.