is developing a taxi booking app from uber clone script a good idea? 

Building an app from the scratch will cost you more. However, there are clone scripts available with popular app development companies. You can buy their script and customize them based on your needs. Considering you want to go for the app with minimal functionalities, the estimated cost to build such an app from scratch would cost you at least 10,000 USD. In case you want to go with clone scripts, you can drastically reduce the estimated cost around 75%. Get to know more on, http://uber-clone-script.blogspot.in/2016/04/is-developing-taxi-booking-app-from-uber-clone-script-good-idea.html