Land near Mandya cost anywhere between 2.5 lacs to 5 lacs per acre, so it is 25 lacs to 50 lacs investment on land for 10 acres. it will be almost impossible to make a viable project in short run.However, the investment per se is OK since the land value appreciate very well. If you can purchase land on your own banks can fund for all developments. you needs to conceptualise a project idea and get a project report prepared to get bank loan. NHB do fund some portion of the land value as subsidy but NHB is highly undependable.
Regarding what is small/margin farmer a question asked by some body:- 5 acres/2.5 acres of dry land or half of it as irrigated land respectively make the small/marginal farmer. However, there is a different definition for financing land by banks which is much higher and it will be around 12 acres for Mandya district if you are purchasing dry land. But generally it is permitted for existing farmers near their existing farm.if you purchase say 2 acres on your own , more can be financed with a good project report provided you can prove your repayment capacity otherwise also.