public function isBookable($fromDate = 'now', $days = 7)
    {
        $fromDate = Carbon::parse($fromDate)->timezone($this->business->timezone);

        $count = $this->business
                      ->vacancies()
                      ->future($fromDate)
                      ->until($fromDate->addDays($days))
                      ->count();

        return $count > 0;
    }