Keeping up appearances in society i believe is the answer though im not entirely sure
Though it could be power of wealth but then again in the excerpt he said for those who want to be wealthy so the answer would have to be Keeping up appearances in society.
due to him saying for those who want to be rich and he thought that his was exceptional even though it looked like all the others which means he kept his appearance in society to get praises from his family which means the house is nice.
