Can anyone suggest any cameras (can be purchased via US retailer for warranty and tech support purpose) for low light setting bar/restaurant with three floors? I would definitely need 12 + camera for indoor and 2/3 for outdoors. I read through WIKI and Notes and it seems everybody loved Andy from Aliexpress and Dahua cameras. I am usually tech savvy but setting up 12+ cameras would be too much time and effort for new restaurant owner. I am also leaning towards getting Lorex 4K camera system from Costco and have professional install. Please suggest.