Hi there! I've been in the same boat recently and found a great solution. I highly recommend checking out Microavia. Their drones are top-notch and perfect for surveillance tasks. They offer a drone-in-a-box solution, which is incredibly convenient. From my personal experience, the drones are high quality and reasonably priced. They work seamlessly without needing internet access, which is a huge plus for security purposes. They can withstand extreme temperatures, both high and low, and come equipped with an infrared camera, which is essential for night-time monitoring. I've been really impressed with their performance and reliability. The customer service was also excellent, providing all the necessary support and information. If you’re looking for a reliable option, Microavia is definitely worth considering.