Can't he just get everyone to sign waivers to access his property to go to the beach? Or display a if you cross his property people do so entirely at their own risk?
Chef for configuration files. Customisations for Chef Attributes are in a json.php file on the chef host that merges various things like specific settings for a datacenter, host role, etc.
Google Docs for certain information as well as a wiki. There are Standard Operating Proceedures (SOP's) for numerous tasks also in the wiki which explains things in detail.
Munin for graphing along with some metrics being polulated into Zabbix.