Because not only could it be dangerous, it could also turn into a fire hazard if it is not done right. Electricity is not something you want to take any chances with. Additionally, although you should probably stick with a wireless doorbell camera, if you want a wired doorbell camera and your landlord gives you his/her blessing which he/she might do if you have it professionally installed, it’s even more important that you not only get your landlords blessing, but that the written permission he/she gives you includes exactly what you can and can’t do as far as drilling holes in the walls, ceilings, etc. This will protect you from having to pay damages due to miscommunication when you move out. You will also need to realize that sometimes a landlord will give you permission to have a hardwired doorbell camera installed, but he/she might also require that you leave it with the rental when you move. A cloud video storage feature is good to have if you can afford it. There is also a local video storage option that has internal storage capabilities or you can store your video using a microSD card neither of which require you to pay for storage other than the price of the microSD card. However, once the storage is full, the camera will record over the pre existing video, which could present a problem if you ever need to access the recorded history of your doorbell camera. That is where cloud storage has the advantage because you can store as many hours of video recordings as you are willing to pay for. That’s a great question. And to answer it you should start by checking with your apartment manager.