As I mentioned above, there's an inherent risk that you'll end up out of pocket in this case, but there are ways to ensure you won't lose all of your money if you're rejected. Look for flights that allow you to purchase insurance that ensures you can cancel your flight and receive your money back (excluding the insurance fee), and do exactly the same for accommodation -- there are plenty of hostels, hotels, and Airbnb apartments that will refund the full amount of your booking as close as 24 hours before your arrival date.
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