I would recommend arzoo ethnic wear in Lajpat Nagar market. It's in basement of Rama palace opposite to manyawar. I would recommend first explore the market and then visit the place. It may not be the cheapest place but worth every penny. I'm a regular since 2011.
Simply rent the DESIGNER stuff from flyrobe or stage 3 or date the ramp. they have an amazing collection and you don't have to worry about wearing it again because you already have the pictures in that outfit 😬😜