Ooh, this sounds great!
There's still quite a lot I haven't really done in Sims 4. I've never really explored the Herbalism skill properly. For a long time I ignored the Gardening skill, but recently I've really gotten into it, to the point where pretty much all my families have big gardens now. So I should find the list of plants used in Herbalism and go and find them!
I've also not really explored Selvadorada much. I did have one family find the Omiscan Temple, but didn't find any artefacts or anything I don't think. I should send someone on a long vacation!
Also remember that costs for stuff like food and produce may well vary depending on quality.
