Home Mechanical Ventilation shows a substantial cost reduction, aligning with published data from Lloyd-Owen et al. (Thorax) and Murphy et al. (JAMA). COPD Exacerbation savings reflect avoided ED visits and readmissions, supported by COPD Foundation and Criner et al. (Chest). High-Flow Oxygen Therapy savings are consistent with Frat et al. (NEJM), showing reduced escalation and lower treatment costs.