It can add a lot of stress to his dual life. He has to balance serving drinks and being Spider - Man. For instance, if there's a sudden emergency while he's at work, he has to find a way to excuse himself without raising suspicion.
Maybe Peter meets some interesting characters at the bar. It could be an old scientist who gives him some insights on new web - shooting technology. This could help him improve his Spider - Man gear. Also, the bar could be a place where he unwinds after a long day of fighting crime, and he might meet a girl there who is initially attracted to the normal 'Peter' not knowing he's Spider - Man.
It affects his ability to be Spider - Man. Without a stable home, he has no place to keep his suit or his web - shooters. He might have to carry them around all the time, which could be risky. Also, it can make him more vulnerable mentally. He's used to having a home and a family (even if his aunt may be struggling too), and now being homeless can be a huge blow to his confidence.
It could also make it difficult for him to be a reliable superhero. If he's sleepwalking at random times, he might not be able to respond to emergencies in a timely manner. His allies would start to worry about his ability to protect the city.
If Peter is spanked by a fellow superhero in a fanfiction, it could lead to a sense of resentment at first. But later, he might realize that it was for his own good and grow from the experience. It could be a catalyst for him to better understand the superhero code and become more responsible.
His relationship with Aunt May could become more complex. She might be overly worried about him and his ability to cope with the prosthetic. There could be a lot of tender moments where she tries to take care of him more than before, which Peter might initially resist as he wants to be independent.
It could strengthen his relationship with Tony Stark. Since Tony already had a mentor - like relationship with Peter, this new level of honesty might make them even closer. Tony could become more protective of Peter, seeing him as not just a protege but also a true member of the Avengers.
Peter's spider - sense could be a great asset on the farm. It could warn him of approaching storms, allowing him to quickly secure his crops and livestock. When it comes to handling dangerous farm machinery, his enhanced reflexes from his superpowers would keep him safe. Also, if he ever needs to climb tall structures like silos or windmills, his ability to climb walls would come in handy.
His relationship with Morgan herself could also be affected. He might not be as kind to her as he should be. Instead of seeing her as a little girl who just happens to be in a situation where she gets a lot of attention, he could start to resent her, which would make their interactions awkward and uncomfortable.
It can affect his powers. For instance, if he has a head injury near his spider - sense area in his brain, it might make his spider - sense go haywire, either being overly sensitive or not working at all.
Well, if Peter Parker has cancer in the fanfiction, it would definitely impact his life as Spider - Man. Physically, he might not have the same strength and endurance. He could struggle with fighting crime, getting tired more easily. Maybe he'd have to rely more on his intelligence and web - slinging skills to get by in battles instead of brute force.