Quick recap:

1. Take a USD $3000-$9000 ESL job or any remote job netting you the equivalent.

2. Live on $1000 very comfortably abroad, invest the remaining $2000-$8000 per month at 5%; index funds are a good option and often outperform 5% returns. At 5% returns:

3. After one year, you'll have $24000-$96000/ invested, returning 1200-4800 annually indefinitely, $100-$400 USD per month.

$100 is enough for a month in a hostel, $400 is enough to live in dozens of countries in a private bedroom including utilities/wifi, groceries and data.

4. After 2/8 years, your return will rise to $9600 per year at 5%, $800 USD per month.

$800 USD is enough passive income to live in most of the world in a private house/condo/apartment with utilities/wifi included with hundreds left over for kitesurfing or home theater systems.

8 years might sound like a long time, but it's a lot shorter than 3 to 4 decades and you only work 10-20 hours a week.

You can also blitz 40-hour workweeks 2 months of the year and work 10-hour weeks the rest of the year, there's a lot of customization to be had when you alleviate common financial burdens.