Key legal question
Whether the gain from selling the condominiums is taxable as income from self-employment or exempt private capital gain.
Extracted holding
The gain was taxable under Art. 18(1) DBG because the taxpayer's conduct went beyond mere private asset management and amounted to a systematic, profit-oriented real estate activity.
Extracted reasoning
The court relied on the actually realized conduct: commissioning a turnkey development, appointing a project manager, arranging subdivision and sales, using substantial borrowed funds, and rapidly realizing a substantial value increase. These factors showed a planned entrepreneurial activity rather than a mere isolated opportunity.