Don't think about starting your own lawn care business, do it. Save up money for equipment, start researching the amount of money you'll charge, and begin networking to effectively target your potential clients. Ownership is the only way to true wealth. Also get ready to be disappointed. I pay about 33% of my income in taxes. I pay more in taxes now per month than I used to take home when I was making 50k/year. Lastly you won't feel any different. You're still going to have to budget. You're still going to have save. And you're still going to have to be responsible and sensible with your money.
Tips:
Have a plan and don't think of it as a quick hustle. Building up takes time. You're most likely not going to jump from 40k to 140k in 3 weeks. You'll have to have a sound plan, and spend the majority of your time executing that plan.
Make your financial goals your priority. If you spend more time bullshytting (on the internet, playing video games, watching TV) than you do pursuing your goals, you'll never be successful. You have sleep for 8 hours, and work for 8 hours. If you spend that other 8 hours fukking around, don't complain about not being financially successful.
Don't be a broke high earner. Making 6 figures doesn't mean your rich. It means you have a lot of income. Don't blow your money on bullshyt. I made myself the promise that my monthly bills will no go over $2000/mo, regardless of how much I make. I still drive the same car, still shop the clearance rack at Macy's, and I'm still stingy with my money. Right now I'm saving around ~75% of my income and I give myself an allowance of $100 week (which includes gas). If I want to buy something, it has to come out of that $100. Including haircuts, going out with friends, going out to eat, alcohol, etc.
Purchase income generating assets. Once you hit 6 figures, don't blow your money on bullshyt. Don't go out and buy an Audi, an expensive house, and expensive clothes. Purchase things that will increase in value. Stocks, bonds, various funds, real estate holdings, etc. You should have multiple streams of income.
I'm an IT consultant.