This Nagpur couple earns over Rs 4 lakh per month from 400 sqft room. A Nagpur couple, Akshay Holey and Divya Lohakare Holey, has turned a 400-square-foot room into a saffron cultivation unit using aeroponic technology. By growing the expensive spice without soil, they have built a business generating annual revenue of Rs 40-50 lakh. Their saffron sells for around Rs 6.3 lakh per kg.