Need camera system setup for restaurant (Surprise)

Hello .
I am looking to get an 8 camera system setup.
This is in an 8000 sf restaurant.
You would need to install outside of our hours of 11am to 8pm.
I will need this system to work in some sort of app so that I can watch from a phone.
Please send me am estimate and when you can make it by.
Update: i have the system and dvr already.
Just need install.
I do not need audio.
It will be great if it records with playback.