Traveling agency and budget

I wanna know if someone here went to Thailand before with a traveling agency and if it was worth it or a total scam. And a recommendation. If you have one. I’m going on a honeymoon soon and I went to a traveling agency and they said. That it will cost me 195,500,00 baht for the whole trip. Which is only 15 days. 7 days Phuket, 6 Bangkok, 2 chiang Mai. 4-5 star hotels they said. Idk I don’t mind airbnbs and good hotels that aren’t that expensive. But I think the price is just absurd in general considering I’ve heard that a lot of ppl spend this amount in more than 15 days. It will be my first time to Thailand so I don’t know much.