Add a Reference Type Custom Field to the Listing.
This is not currently possible, you could use a choice type custom field to provide similar functionality.
This is not planned. One may be able to use booking plugins from third parties to integrate with Directories Pro.
No. However, standard WordPress search will search across all directories and by using a plugin such as Relevanssi one can index additional fields to be included in the WordPress search.
Sabai does intend to add the ability to search multiple directories through a tabbed search interface, but this will still not allow one to search all directories from a single search field.
Not currently, but planned for future version.
Directories –> [Your Directory] –> Content Types –> Listing –> Edit –> Search –> Location Search.
It can be used for a single site with multisite but cannot be used across multiple sites using multisite.
Yes, by adding a custom field to the taxonomy with the type image. Locations by default include this image field, other taxonomies do not.