翻译：如果我可以通过课余时间打工赚到足够的钱

If I can work as a temporary labourer and earn enough money through extracurriliar time

If I can earn enough money by taking part-time jobs in my spare time.
介词该用by表方式，另外课余时间是in my spare time
赚钱用earn money 表达较好

If I could make enough money through taking part-time job

同意楼上的翻译

松岛宝珠

同意三楼的翻译