If you like to do things yourself around the home, then maybe a thermographic camera could be useful. You get great flexibility since it runs on a battery and lacks a cord that can
From Amazon
FLIR TG267 Thermal Camera
Acme Tools
FLIR 160 x 120 Pixel Resolution Thermal Camera, TG267
Gadcet
FLIR TG267 - THERMAL IMAGING CAMERA, New