Precast Walls - Prices, Dos and Don'ts

My Uncle, who is about 84 years old asked me to help him put up a pre-cast wall on their land .... somewhere around B N Reddy Colony ... I absolutely have no idea about this. So, dear Hyderabad, if any of your have any sort of experience wiith pre-cast / pre-fabricated walls, please let me know .. a. What is the price range and how is it calculated ? b. What are the areas that we have to absolutely take care of when setting this up .. ? c. What are the abosolute DON'Ts when doing this ? I know it might be a random and bizzare question .... but I personally don't know anyone who did this, Appreciate you taking your time to read this ...