Well, for anyone wondering how to do that:
("sail_from_port",[(party_slot_eq,"$current_town",slot_party_type, spt_town),
(store_troop_gold, ":gold_check", "trp_player"),
(eq, ":gold_check", 2000),
],
"Buy a ship (2000 denars)",
(Good idea, by the way.)
("sail_from_port",[(party_slot_eq,"$current_town",slot_party_type, spt_town),
(store_troop_gold, ":gold_check", "trp_player"),
(eq, ":gold_check", 2000),
],
"Buy a ship (2000 denars)",
(Good idea, by the way.)