Cellular security cameras aren't necessarily more expensive than traditional wired/wireless surveillance cameras, given the benefits and flexibility they offer.  You need to spend extra money on data plans for cellular security cameras. Again, manual recordings and live streaming will increase your data consumption, which means you need to pay even more for the data service.  Additionally, you need to replace batteries now and then. But there are models with rechargeable lithium-ion batteries, so consider those models to keep your operating costs low.