Best option for short term investment?

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I have $3k I am looking to invest short-term ( > 12 months), any suggestions? I;m looking for highest rate of return...

Additional Details

I have been considering starting a small business and utilizing the internet for sales. I jumped into one about a decade ago, and it was actually turning profit (albeit slow), but I actually enjoyed it. I would love to make enough profit, on a monthly basis, to quit my garbage of a full-time job. Thanks for the input!

Best option for short term investment?