Maritime industry pays well and you need no schooling (not even high school diploma).
If you have $50k, you can go to a school and become an officer (after 2-3 years) making ~$600/day with a good upside. Around $100 extra after a year and in 5 years if you put effort, become captain (or chief engineer) making ~$1000 or more a day. You work 6 months per year (so $180k + benefits as those ratings).
If you don’t have money, you can do an apprenticeship from a union and after 4 months, be making $8k/month. After a year, it can go to $12k/month and you’ll be making six figures. It’s way more laborious than working as an officer but easier to get in and start making money. It’s capped at $400-$500/day but after ~5 years, you can upgrade to become an officer. By then you’ll have good savings since you don’t have to pay for rent or food while working.