@Bryan Lee Hi Bryan and welxome to Montreal :) Hope you arr enjoying the recent cold weather and especially tomorrow’s cold one :)
Firstly, I would chexk out the comparatives in order to know how much similar appartments as his are rented for, then seehow much time you think that it would take you to pay him off.
Secondly, find out whether or not he owns the triplex outright, because if he does, you can offer seller financing. The advantage for him will be that he will be paying less in taxes because he will be getting smaller amounts every year compared to one big amount this year. The downside for him is if he needs the money right away he won’thave access to it all, but you can always remind him that he will be making some extra money in interest than if you were to get financed by the bank. The only thing is that you will have to find the money to pay the agent his/her money upfront, because I strongly doubt they will want partial commission payments.
Thirdly, I am not a fan of letting a seller live in the same property they sell because there might still be that emotional attachment. But judge based on the way he his. If he’s a nice guy and simply want to live a simple quiet life where he is, then it might be a good situation.