AIR COOLERS. suggestion

all air coolers are more are less same, thing is where you place, if possible place it outside of room window and project air to room (yeah, outside of room) or place it near open window, otherwise you feel sticky and less comfortable

You can refer to this thread to understand the good brands in Air Coolers, best selling models and suggestions
Symphony is the leading company within the Air Cooler space, and they have lower models which are decently priced