Assuming this was paid off in 10 years, you'd pay 250k in interest. A 500k return is 10% annual. Still good, but not world beating. Also property ownership come

Assuming this was paid off in 10 years, you'd pay 250k in interest. A 500k return is 10% annual. Still good, but not world beating. Also property ownership comes with its own costs (taxes, upkeep, time, etc). A worthy investment all the same, but its not all rainbows and butterflies.