Purchase or rent commercial property in india

I have a query regarding acquiring commercial property. If a business enterprise wishes to set up business in India and decides it needs property with a building on it, what should be it's course of action? Should it buy the property on rent or purchase it? What factors need to be considered for both? For example what taxes are applicable, what tax deductions can be availed, is insurance required, maintenance, depreciation, payment in cash or by raising funds? I want to make a financial analysis of this. Can someone please tell me what all factors I need to consider so that I can make a cash flow analysis and find the npv?

Thanks