We have traveled as a couple to Thailand (Phuket, Krabi and Pattaya) for 7N/8D from India at a total cost of most of 1.6 lakh for two including shopping.
The cost break up was as follows:
Hotels and itinerary: 63k
Shopping, food and other activities: 52k
We have stayed in 4 star hotel for 5 days and 3 star hotel for 2 days.
You can cut more the cost by selecting cheaper hotel and limiting the food, shopping etc.
You can watch our YouTube video for the complete planning.