There are several security tool suites : Fedora Security, Kali penetration Tools, Metasploit and Security Onion to name a few.
Security Onion is a suite of Intrusion Detection System tools. It is widely recognized by many including the US government as having done the best job of integrating disparate packet analysis tools into intuitive GUIs.
It truly is IDS in 30 minutes with a few clicks.
Although sophisticated, these tools are getting very close to the the Do-It-Yourself level.
Experts are required to get the most out of these tools, however, a surprising level of value can be realized by users with little security experience.
Security Onion is a tool suite which can be easily installed.
Configuring the tool within your LAN is uncomplicated.
If an event occurs, the system will highlight and present the information. If the intrusion is serious, then qualified analysts can be contracted to investigate.
All of the information and tools they require to perform a forensic analysis are already in place.
So, the level of "preparedness" brought by a Security Business Plan can be moved significantly utilizing the current workforce and spending plans.