A 74 y/o F with breast cancer presents with altered mental status and abdominal pain. She is found to have hypercalcemia with a corrected Ca of 3.9. She is otherwise healthy apart from hypertension. Her vitals at triage are HR 115 BP 132/62 SpO2 97% T 36.8. On examination, she is confused and agitated. Her heart sounds are normal and she has no peripheral edema. Her respiratory exam is normal. Her abdomen is somewhat tender to deep palpation throughout but there are no peritonitic findings. Which of the following treatment modalities is LEAST appropriate for her management?