You won't regret it

I know the program costs a lot of money. But consider it an investment. Not only do you get a TESOL qualification taught in person (better than an online TEFL) which you can use anywhere, but you will also grow as a person. The teaching work in Vietnam is very rewarding, with 80 hours a week teaching paying over £1000 a month (after tax). It's incredibly easy to save, and still live in great accommodation. I've met many amazing people and picked up a second language and several hobbies thanks to all my free time. I feel 10x more confident in myself, and I love living in Vietnam. The people are so friendly, especially if you learn a little Vietnamese.