Depends really as to how many players are going to be there, along with anything else to ‘entertain’ the players when they’re not playing. Also depends on how many of the players are pinball players, and how many are friends and family.
$1 (or voluntary amount) entry. Players play a single game, top 4 scores then play a single 4player game in the final.
Voluntary amount will almost always get your more income, especially as people find out how much it cost you to restore/rebrand the game - and that they’re not paying for refreshments.
$1 to play. Players pay each time they play, as many times as they want, again top 4 scores make it to the final.
With only having a single game, I’d want to steer away from formats where players play in a strict order, as that is likely to cause queues and boredom. Make it fun and informal and I’m sure it’ll be great.
Any comp with only a single game in is not going to be worth many WPPR pts, so I wouldn’t worry about that - just submit it for what it is.