Key legal question
Whether the 2001 real estate gain from the sale of the multi-family house constitutes contributory income from self-employment for AHV purposes.
Extracted holding
Yes. In the overall circumstances, the transaction amounted to professional real estate dealing rather than mere private asset management.
Extracted reasoning
The appellant was professionally active in real estate fiduciary work, frequently engaged in property transactions, used special industry expertise, and sold the property to his own company for business-related reasons; these indicators together showed an activity aimed at earning income.