Why are arcade machines so expensive?

all it is, is a single 8 bit game on a bright LCD screen held together by wood with a joystick and a on and a quarter slot. i doubt i would get an arcade machine but it would be nice, i remember playing on a pacman arcade machine a ling time ago at my uncles. it costs about 2000 bucks for a table top arcade machine, and it would have to be played about 8000 times by customers in order to make any money, uming that you charged people to use it 8000 times, i think i remember there was a way to play the arcade machine for free if you are the owner or have the key, i remember a on on top of the machine at my uncles house, and each press gives you a credit