I've only participated in a handful of Kickstarters, so I'm a bit confused as to how this would work - are people contributing $1000-1500 to your Kickstarter to fund the construction of an arcade machine and, in the end, to purchase that machine? Is there only going to be one tier of supporters - all of which receive an arcade?
Or will there still be $20 and $50 support tiers that are simply funding your arcade-building out of their generous nature?
I would recommend the latter, since most Newgrounders are poor and would likely only part with $20 or $50, not $1000.
Additionally, if there is enough money left over, maybe draw one lucky winner from the $50 or $100 support tier to receive their very own machine? Or at least a sticker or something?