You're Lying.
Yes, it was believable. Considering how poor he became, surely, a time would come when he wouldn't be able to buy or pay for the simplest things.
So, yeah, it was very believable that he wasn't able to pay the rent of the wretched house he was living in.
"If I can't afford to pay the rent of an apartment that is so cheap, then what is left for me? I'm already so tired, I've reached my breaking point. This is what prompted me to want to end my life,
So what do you think? Aren't these enough reasons to commit suicide with everything I told you just now?". His voice resounded, he was done explaining.
He was still standing on top of the barricade, and he wasn't making any attempt to come down from it.
What answer does he want me to give him? That it was enough reason for him to commit suicide? No, I can't tell him that.