You could probably use debt forgiveness as a collection technique: If the person doesn't agree to start paying it back, you threaten to forgive the entire amount all at once in a way that is not tax-advantageous. Now you owe taxes on your $80k of extra income(forgiven debt), and the government is less lenient than banks when they're collecting tax debt. They might eventually be able to get it discharged, but it'd req…
How exactly is forgiven debt considered income?
"What? I don't owe any taxes! That was all a loan!"