> I'm assuming that you have to live somewhere. Our choice is actually whether to drop, say, $50,000 on a down payment and take on a mortgage, or drop $50,000 in the stock market and keep on renting.
I agree. This is an important clarification not usually considered when making a comparison.
> In the stock market, I would now own stocks worth $60,000.
I assume you implied buying on margin since 2 x $50,000 x 0.10 = $10,000, but since stocks historically outpace inflation I'd expect a higher real return.
A $50,000 investment growing at 7% annually would be worth approximately $200k after 20 years. In comparison, a $500k house would be worth about $750k with a balance of $240k remaining, assuming 2% inflation and a 7% interest rate on a 30-year note.
It might be interesting for someone to create a calculator to crunch the numbers and include details such as how much rent would rise over 20 years, the cost of selling a home (about 8%), home maintenance (about 1% annually), etc.