Live without extravagance

Warren Buffet, one of the richest men in THE WORLD, lives in a five-bedroom house he bought in 1958 in Omaha, Nebraska for $31,500.
I don't know him well enough to say he doesn't live without extravagance in other aspects of his life, but I admire the aforementioned fact.
In today's world, people seem to be out to get as much as they can as quickly as they can. We used to keep up with the Jones and now we have to one-up the Jones.
I believe that the Lord blesses us with all things. I also believe we are accountable before Him for the way we use what He has blessed us with.
Do we use our assets for extravagance? To prove something to ourselves or others? To live only in the moment and give no thought for tomorrow? To help only ourselves, giving no thought for "our neighbor"?
At the judgment bar of God, when He gets out our financial/fiscal records, where will we stand? Did we stand in a great and spacious building and point fingers at others who had less than we did? Did we wear fine-twined linen with little children in our midst wore rags and no shoes or winter coats? Did we pay our tithes and offerings? Did we cheat our employer? Our neighbor? Our creditor?
Do not judge others, only yourself? Where do you stand?