1. Make a registered relinquish deed in favor of your brothers for your share.
2.you can send a registered power of attorney for the purposes. Notariesed and registered in US and with indian consulate in embassy in US and shall be validated here in india with SDM/DM.
3.if you show up In person and prepare documents in advance its one day visit to tehsildar/ sub registrar office for registration.
4. You to pay a stamp duty according to value of property and state In.which land is there and registration charges. Stamp duty is differrent in every state in some state only 500/200 stamp paper is required.
5. You need your identification proof, the document conferring title/share on your name along with photographs.