To get a better notion of the price of a fire suppression system, it's best to refer to with a fire protection company or other experts.
A fire suppression system will likely have built-in components to detect fires as https://patch.com/north-carolina/raleigh/classifieds/gigs-services/467764/safeguarding-lives-and-property-all-american-fire-protections-quarter-century-of-excellence