You are making a rocket science. It's simple. There is no option to buy flight tickets under 800 €, average price in high season (January, February) is around 1.000 €+, before covid around 500 € ... there is no option to get a solid hotel room under 80 €/per night ... before covid around 40 € or 50 € ... Alcohol is way too expensive, also daily tours, for example some island hoping and similar ... you shoud know that we would like to relax not daily control our holiday budget ... This prices are almost on Europe level. If we go to Thailand we go for minimum two weeks ... now you can calculate. Then unreasonable restrictions about smoking e-cigarettes ... at least 20% of western smoking cigarettes alternatives.
We can also talk about Thailand as it once was. I understand development, yes, but lost its charm. Sorry.
This year I decided to go to Zanzibar. It's not very cheap but cheapest comparing Thailand. From when? :) And not so much restrictions!