Question : The pagination module only shows page 1, 2 and 3. Could it be possible to make it more?
If you want to change the pagination you should go into help_functions.php file where you have wpestate_pagination function.
The no of pages shown is limited by the the no of pages that really exist – it would not show 4 if 4 doesn’t exist.
see line 417 for ($i=1; $i <= $pages; $i++)