Real estate investors Ted and Jamie Garber have specific cash flow and ROI goals for each of their rental properties. As of 2025, they own 28 units across 15 commercial and residential properties, which Business Insider confirmed through the Brevard County Property Appraiser. To guarantee immediate cash flow, they've narrowed down their "buy box" — the set of criteria they've established that they want to see in a property before purchasing. This general rule of thumb suggests that to create positive cash flow, the monthly rent of your property should be at least 1% of the purchase price. While their main focus is on cash flow, they're reaping more benefits from owning real estate.