His friends like Sasuke and Sakura might help. They have different skills that could be useful.
Well, Naruto might build the house using his ninja skills. Maybe he uses shadow clones to speed up the construction process.
Tsunade could play a crucial role. She could use her vast knowledge of resources and economics to secure the funds and materials needed for the fleet. Jiraiya, if he were still alive, would bring in his worldly knowledge and connections from his travels. He could help Naruto find rare and valuable materials from far - flung places for building a truly remarkable fleet.
Sasuke would be a likely helper. Despite their past differences, they are comrades now and Sasuke has his own set of skills that could be useful in building a village, like his Sharingan - assisted precision in construction work.
Sasuke could be one to help. Given their history and Sasuke's intelligence, he might contribute some knowledge about energy manipulation which could be useful for the lightsaber's power source.
Sasuke could be one of the people to help. He has a deep understanding of weapons and combat. He might offer some advice on how to make the blade sharper and more effective in battle.
I think Rock Lee could be an important ally. His determination and strong work ethic would inspire the people in the kingdom. Hinata would also be there, supporting Naruto with her gentle nature and Byakugan skills, which could be useful for surveillance. And of course, the Nine - Tailed Fox inside Naruto could also be an unexpected ally, providing power when needed.
Well, he might start by using his charisma. Naruto has always been good at making friends. He could reach out to old allies from his village, like Shikamaru and Choji. Also, he might convince some of the outcast ninja who have been mistreated in other villages to join him. His reputation as a hero who saved the world would surely attract a lot of people.
I think Rock Lee would be there to help. His unwavering dedication would inspire the new villagers. And Hinata, with her kind heart, could help in creating a warm and inclusive community. Maybe even some of the older ninjas like Kakashi could offer their wisdom and experience.
In this fanfiction, Naruto could build a guild to train the next generation of ninjas in a new way. He realizes that the traditional village - based training has some limitations. So, he creates a guild where the focus is on individual growth as well as teamwork across different bloodlines and abilities. The guild might also attract some former villains who want to reform and contribute to a new ninja society.
Well, in such a fanfiction, Naruto might use his chakra in a unique way to power the lightsaber. Maybe he'd combine his ninja skills with the new weapon. For example, he could use his speed to make quick slashes with the lightsaber, like his fast kunai attacks.