30k purchase 50k note???

[Jose Zaldivar]

hey so I am working a deal with an FSBO, he wants 60k for the property is off-market of course after I spoke to him I notice he is a very wealthy man, and prob doesn't need the money upfront. (i asked the right questions) so I want to get creative with this and offer him this options

purchase price 80K

pay 30k cash now assign the contract to another buyer have him carry a 50k note due on 3 to 5 years no interests

if accepted this will be my first deal to do like this.

here's some questions I don't have an answer to yet.

who will pay the note in?? will I be responsible for it or whoever ends up with the contract will??

is it even possible to assign the contract if a deal is a structure like this??

also anything else I should be aware of using this type of strategy, the property is in Mecklenburg NC