25 swong is standard imo. I've had 35 games without cash and still positive ROI overall.
If you feel like you beat the game, keep playing, but consider dropping down when it hits, idk, 200$? I'm really not the best person to give you advice on BR management... maybe 250$ is when you drop down. Or say, start mixing in some 1$ games at 300$ also for confidence, but even better - stop downswinging and go back up