This might be Slight OT from your initial post, but fuck it...

I hve 2 different friends who took paths that I found cool. First was a general laborer moving scientific shit to Antarctica. He was a few years younger than me so I only heard about this second-hand through my folks (our parents were best friends), no clue how he got into this but basically he worked for 6 months of the year and then was off 6 months, with the option to route his flights back to the US in a variety of ways... so he was traveling the world back in the 80's.

The second is a cousin, he worked construction building US Embasy's in foreign countries. Being a US citizen allowed him a higher level of clearance so he was able to work in different sections of the building that the local general labor couldn't. He did 2 stints that were 15 months long and 100% paid for a 4 year college degree with the earnings (while also traveling the world).

Both started Straight out of HS with zero prior knowledge/experience.

I can say to NOT be a mechanic. While there's money to be made, the trade schools are a fucking rip-off/joke and the standard path of working for a dealership will force you to shortcut jobs (leave your ethics at the door on your way in) just to try and make a living wage. The best money is working for yourself, I did best by fix and flipping things and offering service on the vehicles I sold.

Look for something that caters to rich folks (or at least well to do). Auto detailing and paint correction come to mind. If you weren't in FL, I'd say learn how to restore vintage windows (like, old single pane wood sash windows), maybe plaster work both are things on those with money can afford. Something I've personally looked into was real estate photography, where you're selling a product to a Business and not an individual. I live in rural bumfuck and a dirt poor county, so it wasn't really viable for me, but might be for you. I've heard a lot of good things about B2B (business to business) transactions over dealing with individuals, so maybe think hard about how you can do something for a business.

Lots and LOTS of ways to earn a good living with minimal investments for tools and time, just have to think outside the box a little.

Get your CDL Takes about 6 weeks to go through a school Get a Haz Mat and Tanker Endorsement and you'll have all the job offers you can handle Downside is it can be long hours , but you'll make bank

get a job in a hospital as a transporter. You'll move patients around for decent money, not hard work and good benefits. Plus they generally pay for education toward your career choice.

Plumbing or carpentry. Plumbing if you plan to be a hand or plumber your entire career is definitely the most money. Carpentry if you're willing to open your own business, get into being a contractor, or want to be more well-rounded and have the option to become a home inspector, etc.

How long they take to learn is going to be entirely up to you, your skills, and who you get hired on with. Typically the 6-8 year mark is when you'll actually know what you're doing and can start making a middle class income.

Aircraft mechanic. where i live its a two year apprenticeship.

What do you consider fast and what do you consider decent money?

i made 60k a year selling cars. It takes around a week to learn?

downside is the long hours.

most dealerships will hire you.

Get an FLT licence and start from there. It's a four day course costing maybe $400 for you guys. My boys are getting $2500 - $3000 a month for just driving an FLT. Then use the money to train in what you finally work out what field you want to do after you sat on a truck all day for three months thinking about what you actually want to do whilst earning bag. It's good money for fuck all and an FLT driver is in demand at the moment.

I'd be a plumber if I could go back in time and do it all over.