It sounds like you have something different in mind than what I was discussing/am doing. To be clear, I am NOT advocating someone go out and buy the most expensive home their lender will approve them for and claim it's a good financial decision. I have always purchased well within my means. I wouldn't tell someone to buy a home and expect to sell it for a large gain in a short timeframe without doing some major renovations.A house is an asset..... for your kids when you die. Even if you down size, you have paid for you home at least 1.5 times due to financing. Yes there is an opportunity cost if you prepay or don't have a 2.5% mortgage and can get 8% in the market, but that assumes that the person will not run the risk of losing their job and not keep up with the payments. A home is a cost of living. You will not make money with it, only your children will. This is one of the largest issues most couples fail to realize, and end up with much too much home because they look at it as an investment. One of the biggest scams going on in this country if you ask me.
We have owned one home our entire 31 years of marriage. It was quite small compared to what we could "afford" or what everyone in my circles own. Single smartest decision of our lives not to upsize. The ability to eliminate personal debt completely cannot be overstated for this discussion. Only when you eliminate all personal debt can you really begin to attain financial freedom. Now, if you make $750,000 per year, the discussion is different. But the average family that is pulling in maybe $80,000 between the two of them..... get rid of debt and do not be lulled into thinking your dream home is the secret to financial security because it will be worth so much in the future.
Assets that generate income should be considered for leveraging. Leveraging an income producing asset increases your return on that asset because your initial input is lower. That is why a 7% cap rate on an investment property can result in double digit returns. You can't do that with a house.
I should add that I am not advocating not to have a mortgage. You need to finance such a large purchase. It also provides opportunity to use your cash for other things, like living. But get rid of it as soon as you can, and for the love of god, do not re-leverage it to buy a car, pay for college, etc. You do that and you are done.
I'm also not saying to go get a HELOC or other equity loans to buy things.
I am saying if you look at interest rates vs investment returns and match your risk to your timeframe, you will generally stand to gain more liquid net worth the longer your timeframe is by not paying your mortgage down early. I don't give a crap that I'm paying more than the actual purchase price on my house, because I will have more money available to me, and ultimately be able to retire earlier, by doing so. The bank can win and I can win, it's not a zero sum game.