You can go to Maldives.
Me and my family visited Maldives in the last month. We stayed total 4 nights there. 2 nights in Holiday Inn kandooma and 2 nights in Over water villa of Adaaran select hudhuranfushi. Total cost of the trip was less than 50K per person. For details you can watch my Maldives series on Youtube by clicking on https://www.youtube.com/playlist?list=PLd0DREjXWaLa_CaVzC_cRBIcU18rgQXVn