Add featured image support to properties

gistfile1.txt

add_filter( 'propertyhive_register_post_type_property', 'add_featured_image_to_properties' );
function add_featured_image_to_properties($property_post_type_args = array())
{
    $property_post_type_args['supports'][] = 'thumbnail';

    return $property_post_type_args;
}

add_theme_support( 'post-thumbnails' ); // this line might not be needed, depending on your theme