A reciprocating saw and having multiple blades is a lifesaver. You will always need a fresh blade in an emergency when the store is closed.
Cast iron pan
Bidet has been life changing
Edit:
5. A multifunctional pressure cooker like an instant pot or ninja
6. Air fryer
With the last two and a pan you can cook some good food for 1-2 people very easily and they are relatively cheap appliances you can use even in a college dorm or apartment.