Need details to harvest rainwater from rooftop

Hi ,

I am constructing an independent house with a roof top area of 1300 SFT approximately. I want to store and use the rainwater from rooftop. I am planning to construct a underground brick storage tank of size 15'*7'*5' for storage. What are the other components involved in this

Can you please let me know the cost for the complete setup

Thanks

SSN

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