A 6-month-old previously healthy boy presents in January with 3 days of cough, rhinorrhoea, poor feeding, and increasing work of breathing. He has diffuse crackles and wheeze on auscultation, oxygen saturation 93% on room air, and is feeding at 60% of normal. A nasopharyngeal swab is positive for respiratory syncytial virus. According to Canadian Paediatric Society guidance, which management plan is most appropriate?