First of all please be aware that random order can dramatically increase the page loading time – especially when other database queries are made like in advanced search case. We DO NOT recommend this.
If you want to go further
- Open property_list_half.php file
- at line 133 you have $order_array = wpestate_create_query_order_by_array($order);
- replace $order with 99
The function wpestate_create_query_order_by_array($order) is located at line 105 in libs\help_functions.php
Also, please note that the results are stored in a transient (cache) – via the code at line 180 in property_list_half.php file
wpestate_set_transient_cache( 'wpestate_prop_list'.$transient_appendix, $prop_selection, 60*4*4 );
You can adjust the cache duration in seconds by adjusting this value 60*4*4