"friends" were indeed huge for such young people...however Seinfeld in-show was supposedly successful enough to buy his father a cadillac as a birthday present,

"friends" were indeed huge for such young people...however Seinfeld in-show was supposedly successful enough to buy his father a cadillac as a birthday present, so I can more readily accept that he could afford a relatively spacious 1 bedroom apartment in 80's/90's NYC (remember that the city used to be a lot more affordable back then).