Long term yoga students usually rent rooms in shared houses. A good place to start enquiries is the 'Post Office House', the green house on the left of the Laxmipuram post office. From there you can get directions to the 'Om House' down the road which also has three apartments. It is possible to team up with other students and rent a flat or a house. Expect to pay between Rs 2000-5000 a month for a room in a mostly unfurnished house, and often a cleaner is included.
Some houses have hot water, a nice comfort to have in the Mysore winter.
Aunty has Rs 30, all you can eat, home style cooking with salad and fresh vegetables from her house near the Kaveri Lodge. It's hard to find, and you'll have to ask a yoga student to show you where it is the first time. The Amesh Prasad , near Bahal Circle, on the same block as the modern Nilgiris supermarket is the central eating place for students living in Laksmipuram. It offers good South Indian food. Like many restaurants, what's on offer depends on the time of day.