It seems like if the students have questions, you won't easily be able to answer them.
I have two close friends (husband and wife) who spent the last 6 years teaching English in Thailand and Bali. In Thailand they taught at a private learning school and in Bali they taught at a school where the wealthier families sent their children.
Per the larger discussion: While there, they lived on one of their salaries and saved the other. I think they left with $15k and returned with roughly double that. I know during there time over there, they took off around a year and half total to travel and relax. They didn't live in glamorous places and eat at fancy restaurants. Instead they lived more like the locals to some extent, but this mentality/lifestyle allowed them to stay longer and ultimately come back home in a better place than when they left.
My wife and I visited them in Bali for four months last year (I am a remote software engineer). By association we adopted their lifestyle and had a fantastic/extremely affordable extended traveling experience.
For the most part I was limited to classes intermediate and above when I started out so there's some basis for communication. Of course the best part of travel is learning the native language. After a few months you can probably start teaching beginners, especially once you get a feel for the kinds of questions students ask. People usually have the same confusion points.
Some "immersive" methods such as the Callan method explicitly do not want you to use the native language at all, even if you know it.
Right now, there is a huge opportunity to teach english to Spanish speakers in Chile and Argentina.
For the most part the qualifications are (1) a heartbeat and (2) English proficiency, and not even native level necessarily. No college diploma needed, no expert understanding of grammar, no upfront money needed.
Of course various countries and schools differ in the level of qualifications and visa requirements but my experience has been that these are not huge hurdles as long as you don't have some super specific place in mind. If "the world" is your destination, it's wide open.