What do you do to make money? What is your job and what do you do to make extra cash?
I told my son when he was very young: Do you want to have a lot of nice toys? He nodded his head and said Yes as he was about 6 years old at the time. I said well that's good, all you have to do is go to school, study hare, make good grades so you can get into college and there you can study hard, make good grades so you can get a college degree and then you can get a good job making a lot of money so you can buy lots of nice toys. It worked for him.
Me I was forced to take the route that many people on here have suggested- Sales - Personally I don't think I would ever want a salaried sales job. It is far better to maximize your earning potential by straight commission sales. If you don't sell, you don't get paid. That's a pretty good motivator.
I bought my computer system & software from a company in Waterloo Iowa many years ago. ASI Computer Systems sells to ad specialty distributors and business form distributors all over the country. Their sales people travel to about three or four big trade shows per year. They also have training classes right there in Waterloo. ASI makes BIG MONEY providing support to the customers that they sell their specialized software to. I assume that they pay their sales people and technical people good decent wages.
And finally the advice I was given when I was a little younger than you. I actually I had the same perspective as you about other people's possessions when I was younger. The millionaire I talked with told me it doesn't matter what business you get into just as long as you are the very best at it. If you are the very best in your field, people will pay you a little more for your product and services and they will refer you to others as well and they will keep coming back to you because they were satisfied customers.
Good luck. Now you have the secret--Ohh wait just one more important secret

Spend less than you make!
For extra cash, I compete in tournaments, gamble at pool, do a little computer installation work, sell used computers and give pool lessons. For the family money, I sell lots of business forms and promotional products.
JoeyA ( no table at home and jealous as I can be)