For this, we would suggest you to get in touch with the nearest authorized dealership of Rolls Royce as they would be the better person to assist you with the same. Follow the link and select your desired city for dealership details.
Rolls Royce Ghost price starts from Rs.6.95 - 7.95 Cr(ex-showroom, Delhi). It comes in two variant, V12 and V12 Extended. Follow the link to get the on-ride price in your respective city. [Price@https://www.cardekho.com/carmodels/Rolls-Royce/Rolls-Royce_Ghost
As such, there are no criteria. If you are planning one then we would suggest you walk into the nearest dealership and have a word with the salesperson as they will assist you accordingly. You can click on the following link to see the details of the nearest dealership - Car Showrooms.