For the test and go hotel , I have mine booked for 1 night and the my other hotels on the following nights. After your results come back negative, are you free to stay in the hotel room until checkout the next day anyways ? I am arriving a bit early 9 AM to BKK airport, so likely they would come within the same day.
TLDR : Answer Summary
Under the Test and Go program in Thailand, after receiving a negative COVID-19 test result, you are generally free to stay in your hotel room until checkout the next day. However, many hotels operate as quarantine hotels where they may not allow you to leave your room freely. You must check with your specific hotel for their policies. If you receive your test result before nighttime and choose to leave, make sure you have packed your belongings beforehand.