Custom shortcodes for property-specific custom fields

Problem statement: You need to hold data specific to each property and reference it with shortcodes in guest messaging, rather than creating a separate custom code for each property.

Current workaround: Creating a custom code for each property, which doesn't scale well.

Impact: Too many custom codes to manage.

Proposed solution: Add custom fields within each property that can be referenced by shortcodes in guest messaging.

Unlock: Manage property-specific content more efficiently.