| I don't know where you're located, and the opportunities will vary from country to country. Whether you can make a lot of money in a "short period of time" depends on what you mean by short, and the fact that you don't have much capital and are working means you don't have the money or resources to invest in starting a business quickly.
Here in the USA, when the real estate market is booming buying run-down properties and fixing them up or turning over high-end houses has been one way people have made a lot of money quickly. But either takes capital and time (and at present the real estate market is terrible here). You could start a business then franchise it through a large territory; a local person here in northern Illinois USA started a small sandwich stand 40 years ago, now he has 2-3 chains of restaurants bringing in many millions a day. He didn't have a lot of capital to start, but he spent 40 years building a business. You could get advanced training in a field where salaries are high in the USA, like medicine or law; but that takes capital and time for the training. Or, you could win the lottery ... but you're much more likely to be struck by lightning.
There are a lot of schemes out there that say they will make you rich quickly. Don't believe them; they'll take your money and leave you with nothing. If your family is in immediate financial difficulty, consider financial counseling to determine a best approach, and the possibility of borrowing & paying off later. If things are really bad, you may have to look into bankruptcy and engage a lawyer, if that option is open to you in your country. | 
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