I want to purchase a shuttle bus for transportation and plan to hand it over to someone close to me for a higher purchase. Despite that, I will refund the entire amount to him by the end of the year to assist him since he lost his job and has a family to support.

I'm eyeing a tokunbo, but the current price is between 2.3 to 2.4 million. I've noticed used ones with a clean body ranging from 1.2 to 1.7 million depending on usage. Considering my budget is 2 million, I'm contemplating buying a used one and then replacing the engine entirely and do some maintenance on the body for a potentially more cost-effective option. Would this be a wise choice?