I agree with most of his ideas. There's lots of good deals out there on ebay, craigslist and at the pawn shops and goodwill.
Buying a big house, though, might not be the best idea on a modest income. Big houses tend to come with big utility bills and you can't buy used electricity on ebay.
Not too mention the taxes and insurance premiums. Just because one has a six figure salary does not mean its all glorious living.
There has to be some context.
In Texas, you can get about 40% off electricity if you go month-to-month and take 10 minutes a month to check rates. Our average bill has gone from a bit under $300 to under $100 for our all-electric 30 year-old townhouse.