It depends on your perspective. Some might think so, while others might have doubts based on various factors like the hero's actions and character development.
Harry would be very cautious at first. He has been through so much and wouldn't trust just anyone. But if it was to save his friends or the wizarding world, he might consider it. He would probably grill the 'hero' on their motives and abilities. Hermione would approach it analytically. She would want to know all the rules and regulations of the 'Rent a Hero' service and study how it works before getting involved. Ron, on the other hand, might be more easily swayed by the idea of having a 'hero' around, especially if it meant getting out of a tough situation or getting some glory.
One possible plot could be that a wizard has the ability to 'rent a hero' from a magical service. Harry Potter himself could be rented out to help a young, struggling wizard face a new dark threat in the wizarding world. He could use his skills and experiences to train this wizard and together they could uncover a plot by a group of Death Eaters who are trying to revive Voldemort in a new way.
The manhwa 'A Broken Hero' tells the tale of a once powerful hero who has fallen from grace. He has to overcome inner demons and external obstacles to reclaim his heroic status. The story is full of action, drama, and self-discovery.
In chapter 21, the story progresses significantly. The hero discovers a hidden power and the villains become more menacing. There's also a hint of a larger conspiracy.