Customs at Indira Gandhi Airport, New Delhi is fairly fast, especially in very early morning in your case. I have been done International to Domestic Transfers in 1-1.5 hours. Since yours is on non-peak time, it should be even faster for you.
Unless your incoming flight is significantly delayed, you don't need to worry about this.
You shouldn't be worried about it much. There will be a Holiday Inn guy who would be waiting for you at the arrivals. Either he will lead you to the hotel or direct you to the desk, where another person will lead you to the hotel.
If you are departing on a domestic flight, not sure if Kathmandu is domestic or international, it is really a twisty way as you ...
I'm an Indian and I'll give you a quick fix for this.
I was at IGI Airport (Delhi) few months back and a foreigner sitting right beside me was perplexed about how to use the free Wi-Fi he was in the same situation as you.
So what he did was:
He approached me politely and explained me his plight and since I had 2 sim registered in India (with different ...