If Farhan and Raju spent years trying to find Rancho, how come they didn't come across the Chanchad residence sooner? They could have easily gotten Rancho's Shimla address from the university, confronted the real Ranchoddas, traveled to Ladakh, and have found him without Chatur's help.
It is possible Rancho didn't tell Farhan and Raju about his home address as it may have led to his true identity, thus breaking the friendship between them which Rancho wouldn't want, especially how shaky their start was in their earlier years in ICE before their bond had been solidified. Not to mention he would get in trouble with the school authorities if ICE, especially Virus who was keen on taking down Rancho, wound up learning that one of their students was an imposter. One might say that despite Rancho being the star student of ICE, he still maintains a low-profile in order not to arouse suspicion and curiosity from others. It's quite impressive that in four years, he managed to hide his true identity from the two, considering how tightly-knit they were and how Rancho knew Farhan and Raju's respective issues, while the two didn't really know about him. And the university can't simply just give away Rancho's address or any information like grades to anyone who isn't him, no matter what Farhan and Raju's reasons are.
Likely, Rancho and Ranchoddas (using this for the actual one) both wanted to make sure that they weren't caught so Ranchoddas threw a ton of money since he's wealthy enough to do that to keep the address off the books or something. After ten years, they put it back, figuring the lie didn't need to be under wraps anymore. Plus, Rancho might have asked Ranchoddas to do that so the idiots had a lead. Besides, they are all adults and life can get in the way.
Why didn't Rancho during the interim of his disappearance send an anonymous letter or leave any clues to his friends and Pia about his whereabouts? Surely, they couldn't be monitoring how communication?
