Why are all the houses in Thai dramas the same?

The houses in Thai dramas are always the same, but most of the movies are shot on the set or in the film and television base. There are not many places to take pictures. I often see those soldiers living in luxurious houses in Thai TV dramas. In fact, this is not intentional in TV series, because in Thailand, the status of officers is very high. Just like the rich in our society today. All Thai soldiers are rich.