demonstrated staying power during periods of long-term challenge, consider a highly rewarding project that will take perhaps 2,000 hours of work—some two to three years of your spare time.
There’s a bundle of designs to choose from. Investigate by joining the Experimental Aircraft Association, which includes a subscription to their magazine, Sport Aviation. It’s loaded with real-life experience, as well as occasional excesses of optimism, for some of the stories are written by people pushing their products.