"And if you're an engineer, scientist, or anyone who appreciates the elegance and beauty of aerospace technology, it's just a happier place to live."He spent around $15,000 and 2 years making the plane into a homeCampbell added a makeshift shower, a temporary sink, a portable washing machine, a refrigerator, and a food service cart from another plane that serves as his pantry.Now, Campbell spends his time restoring old computer systems, fixing different electrical systems on the plane, and letting people come over and tour his aircraft.In my experience with my guests, I believe that humanity will embrace this vision wholeheartedly in enough proportion that we can utilize every jetliner which retires from service," he says.Sign up now: Get smarter about your money and career with our weekly newsletterDon't miss:This 23-year-old pays $1,100 a month in rent to live in an apartment the size of an average parking spotThis family left the U.S. and bought an apartment in Portugal for $534,000—look inside their 400-year-old home"