[WordPress] How to use multiple instances of WP_Query to retrieve results with common meta data.

1-search-account-type.php

 <?php
 /* Look for all of the acme post types that are either public or private. We are
  * assuming that public or private is specified in the $_POST collection and that the
  * proper error handling has already been done.
  */
  $args = array(
      'post_type'  => 'acme',
      'meta_query' => array(
                          array(
                              'key'     => $_POST['account-type'],
                              'value'   => 1
                          )
                      )
      );
  $search_query = new WP_Query( $args );

  // If there are results, then push the IDs into an array
  $account_types = array();
  if ( $search_query->have_posts() ) {
    
      while( $search_query->have_posts() ) {
        
          $search_query->the_post();
          array_push( $account_types, get_the_ID() );
          
      }
      
  }
  wp_reset_postdata();

2-search-minimum-and-maximum-types.php

<?php
/* For ths post type we'll pull back all results that have a minimum and maximum value
 * that sits between a specified range.
 *
 * Assume that $range has been defined elsewhere in the code where it would look something
 * like this: array( 1000, 4000 );
 */
$args = array(
    'post_type'  => 'acme',
    'meta_query' => array(
       'relation' => 'OR',
        array(
            'key'     => 'minimum',
            'value'   => $range,
            'type'    => 'numeric',
            'compare' => 'BETWEEN'
        ),
        array(
            'key'     => 'maximum',
            'value'   => $range,
            'type'    => 'numeric',
            'compare' => 'BETWEEN'
        )
    )
);
$search_query = new WP_Query( $args );

$min_max_values = array();
if ( $search_query->have_posts() ) {

    while( $search_query->have_posts() ) {

        $search_query->the_post();
        array_push( $min_max_values, get_the_ID() );

    }

}
wp_reset_postdata();

3-find-the-union-of-the-posts.php

<?php
// Now push all of the arrays together, find their intersection, and make them unique to get our results
$results = array_unique ( array_intersect( $account_types, $min_max_values ) );