Amazon has Defender Security U 10827 Reinforcement Lock on sale for $12.65! Personally I installed two of these on the doors in my house and they make the doors basically barricaded. I haven’t gone as far as some and tried to kick my door open with them but if you try and open it with one of these on there good luck getting in lol.
https://www.amazon.com/gp/product…PDKIK
https://www.amazon.com/gp/product…PDKIK
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