>>60
If you want a romance with a similar dynamic, try Seikai no Monsho. It's sci-fi instead of fantasy, though.
And if you want to keep it fantasy, go with Maoyuu Maou Yuusha. It's basically to macroeconomics to Spice and Wolf's microeconomics.
>>75
I think Im having more fun reading the light novel right now but rewatching the anime might be good because I didnt understand some stuff sometimes and didnt bother trying hard to so I might see it in a new light with the anime.