In our Guide's chapter on Finding and Applying for Jobs
, we do include a brief discussion of these All-in-One Cultural Exchange Programs
. Fees range as high as USD $3,500 and whether it is worth it or not depends entirely on how important convenience is to you and how willing you are to conduct your own due diligence.
Certainly, obtaining a TEFL certificate through an online course and then applying to schools on your own will be a lot less expensive.
Best of luck,