From a plush office in Nariman Point to a small office in a gully in Vile Parle, it is a tough transition. “I used to stay at the Taj whenever I’d come to Mumbai,” says Naveen Tiwari, founder of mobile advertising service Mkhoj. “But when I started my own company, I slept on a mattress in an empty room.” The ex-Mckinsey consultant, who did...