A 45-year-old man in rural South Australia presents with 2 days of cough, fever (38.3 °C), pleuritic chest pain and dyspnoea. He is a non-smoker with no comorbidities. Observations: BP 128/78 mmHg, HR 96 bpm, RR 20 breaths/min, SpO₂ 96% on room air. Chest X-ray shows a right lower lobe consolidation. CURB-65 score is 0 and he is being managed as an outpatient. According to current Australian recommendations, what is the most appropriate empirical antibiotic regimen?