Keep the condo. It will continue to appreciate, and is a good insurance policy to guarantee you will never be homeless. If you lose your cash in a financial crisis with a depression like stock crash (which is completely possible in the next 50 years due to climate crisis, war, dwindling resources, disease, other unforseeable catastrophes). You don't want to end up relying on renting. Look at San Francisco, where tenants who have rented for decades have nothing now, and are being kicked out and have nowhere to go because the landlords want to rent raise the rent to maximize profits.
Invest all of your money and live on a budget! Dont' spend money on unnecessary things. Live frugally. A penny saved is a penny earned. Take $300 cash out, and that is all you can use for food. Have a monthly savings goal, and transfer the money to your investment account automatically so that you cannot spend it.
Invest 70% of your money in index mutual funds to get the best diversification and lowest costs. The other 20% can be in stocks, primarily pharmaceutical companies and health-related companies, as well as some tech companies such as Google and Amazon. The other 10% can be invested in tangible physical assests such as gold and silver, and bonds. These are safe, and will appreciate to hold their value, and the metals will always have instrinsic worth. Particularly, silver is underavalued relative to gold right now.
Assuming you dont' sell your condo, and have $500,000, you can expect an 8% return on your invsestments. That's $40,000 a year. Try to maintain your investments total value, adjusting for 2% inflation. So,the first year, you want to have $510,000, to maintain the $500,000 value the next year. This means that you can spend $30,000.
You will also have OAS, pension, and it's a good idea to have a side hustle to keep you active and bring in some extra cash. Assuming, you pull in another $15,000 a year, that's $45,000 total to spend. Taxes will be low, as most of the income will be capital gains. Assuming you keep $35,000, that's about $3,000 a month.
$500 condo fee
$500 food
$200 utilties (internet/cable/cell)
$150 insurance for car
$200 gas
$200 health/medication
$250 clothes/household items
$1000 entertainment
That should be a pretty comfortable lifestyle, so yest, it can be done if you are careful and dont' spend reckless, and invest wisely.