It depends on your dividend yield (%), which in turn depends on your choice of stocks and entry price.

You can refer to ://.investmentmoats.com/DividendScreener/DividendScreener.php for the yield at the given price and dividend for the top dividend-yielding stocks on SGX.

Assuming a conservative 5% yield p.a., a principal amount of $300k would yield $15k in dividends a year.