@Kalpana7
Hey Kalpana, there are very few rights or wrongs to hosting, you have to do what works for you!
You will get some backlash 'comments' here about this arrangement of yours but I understand why you do it. You are concerned about the security of leaving a key on site. And the comments you will get here are made because we as hosts are concerned you are making your listing access un-neseccarilly hard on yourself. Nobody is criticizing you, just trying say, it could be easier for you!
Where the problem comes in here, you have probably cost yourself more in time, money and effort getting that key to each guest and then retrieving it at the end of each stay than what it would have cost you to have an Airbnb supplied access code to a smart lock system where by the guest either holds their phone to the door lock and it opens, or else they are supplied with a specific code that only operates for the duration of that stay.
Google 'Smartlock' and you will find different versions will be displayed, some of which would no doubt be available in India.
I just did a Google search and a number of alternatives came up including this link.....
https://www.youtube.com/watch?v=GxfNVLdRyLk
Kalpana, you have a beautiful property in what looks like a heavenly location. A lot of money has been spent on presenting this property to the state that it is in, and it's a credit to you.
I would urge you to look at remote feature door locks so you don't find yourself in this situation again!
Cheers......Rob