What is the cheapest way to travel from Manipal Institute of Technology (MIT), Udupi to Vellore Institute of Technology (VIT), Vellore, and vice versa?

Haha that is actually great because you two are not very far from each other. The best way would be to travel by train from Udupi/Mangalore railway station, but I am not sure if you will have a direct option. The other possible option is by bus, which you might get easily, because there are a lot of buses running along the Bengaluru-Chennai route, and they should have stops in between close to Vellore. So you could either take a train from Udupi/Mangalore or take an overnight bus to Bangalore and then to Chennai. I believe the train will be cheaper, but it might be slower as well so you need to take the final call