Hatchback for mods:
Swift would be good and easy to find one in good shape as well! Plus, it lends itself to mods pretty well!
But, on the negative side: Modded swifts are becoming a common sight in trivandrum (if you intend to have it in trivandrum). So, you'd have to plan well to have some identity among the crowd.
If it is just light mods+ cosmetic mods that you plan to do, a used
Palio 1.6 Sport could work out to be a cheaper (better?) option. That is, if you can find a good car in the used car market.