Someone recommend me an anime or manga where the protagonist owns a domain (town/city/ect) and works on developing it.
@Ronnie21093 are you kidding, there's an anime airing currently that's exactly about that.
Okiraku Ryoushu no Tanoshii Ryouchi Bouei: Seisankei Majutsu de Na mo Naki Mura wo Saikyou no Jousai Toshi ni
Okiraku Ryoushu no Tanoshii Ryouchi Bouei: Seisankei Majutsu de Na mo Naki Mura wo Saikyou no Jousai Toshi ni