Is this a good plan?

I have a plot of land purchased at 3.5 cr 150m from a main road in a metro city where I want to build a guest house or hotel. I dont want to run the hotel but simply lease it out to professionals. I have a few contacts for this and initial feelers have positive responses.

Details: 2200 sq ft commercial area on the ground floor and 35-45 rooms on the floors above.

Construction cost estimate: - 3.5-4 cr including soft furnishing - 2.5 cr without soft Furnishing

Rent estimate: 15000 per room per month Monthly room rent = 6.3L to 6.75L Commercial space rent monthly = 1.25-1.5L

Total monthly rent 7.5L to 8.25L Annual rent 0.9-1cr

I will recoup my total investment in 6-8 years. On paper this seems like a no brainer. What am I missing?