hound recruitment cost

2+ arenas; player can send first 2 villagers to make a brawler for 30 gold, next brawler should be 45 gold, but if player send next 2 villagers while first brawler didn't appear after one villager from first group is killed (1-2 second window) game will count second brawler as first one and price will be 30. Also work for later brawler conversions with semi-simultaneous fights