We are looking 24*7 home security service suggestion

Hey guys,

i want to install home alarm system in my home but i don’t know more then about this.
i need to 24 hour security service provided in San Diego, CA.
Not sure what I need .I have a pretty small budget
Every customer want to full service provided.
I have been having trouble trying to find a good CCTV. Which camera brand is more cost-effective in San Diego. Like- Champion Security or Pioneer Security
please give some suggestion of Commercial Security System

Thank you