Hi! If you're looking to rent a tent and pitch it at the place of your choice, then one place you can rent a tent for about Rs. 300/day is here : https://www.thelandofwanderlust.com/rent-a-tent-%E2%82%B9300day/
If you would like to stay in one, there are also some good tent stays available near beaches, ranging from Rs. 1,500-3,000. You will also find some packages for a beach trekking adventure for approximately Rs. 3500. You can also look at these trips for a personal touch!
Happy Celebrating!