If you're looking for a super cheap but clean place which has little character but is next to the train station in Delhi then this budget chain should do. It's a sort of an Indian Travelodge but concentrates on being cheap as far as I can see. The Metro is within a minutes walk as is the train station and if you can live with the small windows and the depressing view then it's just fine. I paid about £14 a night for a double bed on the fourth floor.
Is this your business?