Well, these days you can catch a Flixbus from London to Sofia for a mere 150 Europounds, and 48 hours of your time. And from there, Calcutta can't be that far, right?
(But, seriously, you can probably do it in another 48 hours...)
(But, seriously, you can probably do it in another 48 hours...)
https://image.tmdb.org/t/p/w1066_and_h600_bestv2/l5n4h4gmRtj...
https://en.wikipedia.org/wiki/The_Big_Bus
"Cyclops has a passenger capacity of 110 and is equipped with a bowling alley, Asian-style cocktail lounge with a piano bar, swimming pool, Bicentennial dining room, private marble-and-gold bathroom with sunken tub, and chef's kitchen."
Ah, so there is a chance!
1. https://en.wikipedia.org/wiki/Balochistan_Liberation_Army
Source: me and my wife traveled extensively by public transport in, well, at least Pakistan. The other countries are indeed sort-of hairy, but mostly for job-clearance-related reasons.