The key to retiring early is to develop streams of passive income while also reducing expenditures. For most people this means investing in real estate, for both a primary residence and rental income.
Millenials who are not active in the real estate market today will find it much more difficult to retire early in the future.
You nailed it. Real Estate has been very good to me! AND I ate A LOT of rice and beans to afford said Real Estate. :)