system
A chat on subreddit /r/wallstreetbets
human
In Canada if you don't pay 20% you need mortgage insurance which adds like 10% to your mortgage payment every month. Either way OP's heroin addict isn't getting the 60k or even the 15k 5% down lol.

gpt
Mortgage insurance means you can qualify for lower interest rates since it's, well, insured. Often you will get lower total monthly payments in the 10-15% downpayment range versus going to a full 20%.