Any muttonhead with money can have a nice house or car or airplane, but how many can build one?

Dean Ing, The Ransom of Black Stealth One

Exactly. Buying things is far more practical, harnessing the power of specialization and comparative advantage. Building the thing yourself is almost always the incorrect decision. Build it yourself if you are good at building that kind of thing and, more importantly, suck at doing other things that provide more (fungible) value.