A financially independent social worker says his sober-living rentals return up to 75% on his cash. Here's how the niche strategy works.

Scott and Rebecca Steenbergh achieved financial independence through their real estate investments, using them to purchase a dream home. Scott established a high-cash-flow niche with sober-living rentals, generating cash-on-cash returns of 50% to 75%. The couple now operates six such properties along with two short-term rentals in Michigan.