Allocate 0% of resources of the project, and spend your remaining time with loved ones, see some wonders, give them experiences to remember you by, make things right, etc.
what if the project is all i have? no family or friends etc
Go see the world.
assume poverty is a big factor what is something a poor person can do? truly curious if anyone has a cheat code
I'd go for a 3-month hike. Maybe try a big one like the Appalachian trail. Sure you need some money for a tent, good coat, camping stove etc. But the day-to-day costs for hiking are minimal.
Travel on a budget working as a volunteer. I’ve done that when I was homeless and desperately broke. It was the best time of my life at the time.
Sign up for some credit cards...
Still travel, see the world. Experience physical reality! Spend whatever money you have to make your final days pleasant.
12 weeks isn't going to build you a legacy. So just drop the workaholism.
if there is an ideological bent, or other driving reason -- write it up! make treatise / requirements document for someone else to implement.