One challenge could be dealing with the traditionalist shinobi who might not be on board with his more unorthodox methods. They may resist changes he wants to make to the village's training or governance.
One big challenge would be public relations. Sasuke has a dark past, and some villagers might not trust him completely. Also, he's not as naturally warm and approachable as Naruto. He'd have to work on that. Another challenge could be dealing with the paperwork. Sasuke is used to being out in the field, not sitting behind a desk. And he might face opposition from some of the more traditional ninja clans who don't like his new ideas for the village.
He would also face challenges in terms of security. With the Senju name comes a target on his back from old enemies. Enemies might try to take advantage of any perceived weakness during his early days as Hokage. In addition, he would need to manage Konoha's resources carefully. There could be disputes over how to allocate resources between different ninja teams and departments, and he'd have to make tough decisions.
One challenge could be mastering difficult jutsus. The Third Hokage might set high standards for Naruto to learn complex techniques, which would be a struggle for him.
He might face internal conflict. Naruto has always been an open and honest person, so keeping such a big secret could go against his nature. This could lead to him struggling with his conscience. Also, he would need to balance his normal life with his secret Hokage duties without raising suspicion. For instance, he can't always disappear suddenly to attend to Hokage business without people getting curious.
One major challenge would be living up to the legacy of the original First Hokage. Everyone would have high expectations of him. Another challenge could be dealing with the political aspects of being in such a high - ranking position. He's used to being more of an out - of - the - box hero, not a traditional leader. Also, he might face resistance from some of the older clans in Konoha who have their own ideas about how the village should be run. And he would need to balance his new role with his relationships with his friends, who might see him differently now.
He would face political challenges. Some traditionalists in the village might oppose his more progressive ideas. Also, there would be administrative tasks like handling budgets and paperwork, which Naruto has no experience with. Another challenge could be dealing with rogue ninja who might see him as a target to prove themselves.
Perhaps a perk is the ability to shape the future of the ninja world. As Hokage, one can inspire the younger generation of ninjas. They can create new ninja academies or training programs. They also have the power to pardon or punish ninjas according to their deeds, which helps in maintaining law and order in the village.
Sasuke could also be a possibility for the 6th Hokage in the fanfic. He has grown stronger over the years and his unique perspective on the ninja world could bring new ideas to the leadership of the Hidden Leaf. He might start off as a controversial choice but prove himself through his actions in protecting the village and making tough decisions.
Sasuke could be an alternative. He has strong ninja skills and a deep understanding of the ninja world. His experiences have made him grow into a very capable person, and his Sharingan gives him an edge in combat and strategic planning.