[Edi]

Sea trolls are 50 gold unmodded, sea kings cost 150 like troll kings. Unmodded trolls cost 60, so taht'd be 4 upkeep per turn per troll.

As for sites appearing in mixed terrain provinces, consult the site DB. Sites can appear in any terrain listed for them even in mixed terrain provinces, except for certain very few sites that have a negation flag for some terrains. There was one site that could appera anywhere except a swamp, some that could appear in swamp and mountains but not if forest was present and so forth. There are only four to six randomly appearing sites with negative terran controls.

Edi