Thank you frens for valuable input. I came up with a conclusion. Yes, it's possible to do and would be quite cheaper if you can handle all the physical hassles after such a long flight.

Word of caution: only 20 kg luggage is allowed on flights from Delhi to Ktm and vice versa, so that might be an issue. So if you have sinlge luggage bag of less than 20 kg it's a good idea.
@sajhamitra- nepali hariyo passport dhariharuko lagi bhaneko