Thailande is a beautiful country where you can enjoy asian food and have a great time at the best beaches in South Asia. People usually few days in Bangkok and then they go for a road to the thai island. Thailande is a known country for tourismes and also for partying.
I didn’t see that much in Thailande but I can tell things to see in Thailande. I recommend at least to spend a whole month to travelling around Thailande or you have to pick some destinations you would like to enjoy the mosts. Flights are cheap, so you can order easily to move where you want.
Travelling in Thailande cost at least 1000 euros for a whole month to be good and if you know how to spend money. But I always recommend to be large because you never know what will happen. Hotels are cheap and travelling by taking the bus is also really cheap. It cost like less than 10 euros and for the flight, it depends on when you buy it. But at least less or more than 50 dollars. Be careful, some company like AirAsia or Thai AirLion ask you to pay for extra luggage but it’s free for the cabin baggage until 7 kg.
If you want to save money I suggest you to buy street food, to take the BTS when you are in Bangkok and to spend nights at the hostel where you can meet a lot people.