SKIP

The source excerpt is too sparse to construct a reliable 150-250 word summary. While the title references "The Stack" method for scaling rental portfolios from 1 to 10 properties, the actual content provided contains no concrete details, steps, examples, figures, or substantive information about how this method works. The ellipsis indicates content has been truncated. Without access to the full methodology, specific case examples, numbers, or attributed explanations from the source, creating an informative news brief would require inventing details not present in the supplied material.