Is this 4 card poker or crazy four poker? I've never played either game, but you'll get 4 aces out of 5 cards from a standard 52 card deck once every 54145 hands. You can get the house edge from the Wizard of Odds and figure the cost of each round with whichever standard pay table you are playing. Then find your expected loss per hand (house edge times bet). The EV of the progressive has to be enough to overcome that expected loss, so multiply the expected loss by 54145 and that's how much the progressive has to pay out over and above what the standard payout would be without a progressive. If it requires an additional side bet, don't forget to factor that into the cost per round. Even if it goes positive, you're only hitting it once every 54145 hands, so the variance would be sick. This is not a viable play unless you and a well bankrolled team could lock up every seat on more than one table (every table, ideally) around the clock until it hit. Even then, it would take an unusual situation to produce a jackpot worth the effort.