Also the single house does not have any admin fee. Property tax, natural gas and hydro can not cost $650. Gasoline won't cost 300 either. After the correction, $500 should be left each month for misc. It is not bad. I don't expect anyone include home theater expense in their monthly expense. What money is saved for anyway.If they do, of course even $100K will not be enough.
The spending varied with individual family. It's possible some may spend more, some may be less. The way I calculated is pretty close to my life and my friend's life. Not everyone have to agree with it though.