Sep 29, 2020· Risk: 8, Return: 3, Feasibility: 10, Liquidity: 7. Activity: 10. Taxes: 8. Total Score: 46. Rank #2: Real Estate Crowdsourcing. Currently, my favorite passive income source is real estate crowdfunding.Real estate crowdfunding enables individuals to buy a percentage of a commercial real estate project that was once only available to ultra high net worth individuals or institutional investors.