Even if you plant a fake camera ($15), social engineering can deter the theft. There are 433MHz modules and 2 low voltage 555 chips, one for audio generator, one to control on/off time, can be used in a plastic planting pot as a beacon and use 7r as a fox/hound. Double ziplock bag, and a few aa cells can work. The 7r is not gps/aprs by itself, I have one, the 8r can be, but that is not what you have. The 433 modules go a football field in open space, so it may not have enough watts if inside an aluminum sided home for longer detection.