system
A chat on subreddit /r/NoStupidQuestions
human
National Parks are super struggling to find workers right now, at least out west. Many of them have deeply subsidized housing, though it can be shared/dorm-style. You can live pretty cheaply and save what you make, end a couple seasons with some money saved.

As others have said you can do trades, there are some useful online degree programs, but they are job track focused.

Edit: Getting a few responses so to clarify - "Park Ranger" is a very difficult job to get. The parks have all kinds of other jobs, restaurant, hotel, drivers, customer service type things. Park Ranger is a career, these other jobs aren't. But if you're young and looking for something to try it seems like a lot more fun than the military.
gpt
What kind of work are they looking for?