You could go with a cheaper cam if you wanted.
I use this in my basement for detection purposes only
Loryta 4MP 1/2.9" CMOS Starlight POE IR Turret IP Camera WDR IP67 Weatherproof Outdoor,Support IVS, SMD Plus. ,Built-in Mic, Built-in IR LED, High Image Definition, Fixed Lens IPC-T2431T-AS S2...