I'm neck-deep in a monster-breeding LitRPG right now, and honestly, the biggest hurdle isn't the monsters—it's the paperwork. This new world has zoning laws for dangerous creatures, guild permits for transporting anything above a C-rank, and you need a license just to sell monster byproducts. The system might give you a 'Tamer' class, but the local lord's bureaucracy doesn't care. My current read has the MC spending half his time filling out forms in triplicate and bribing officials just to keep his Frost-Wolf pups from being confiscated. It's weirdly refreshing; the grind isn't just about leveling up the pets, it's about navigating a society that's built entire systems to manage the very power you're trying to wield.
Then there's the ecological impact. You introduce a fire-breathing salamander to a temperate forest region for 'pest control,' and next thing you know, you've started a drought and a trade war because you altered the local berry harvest. Real consequences for playing god with an ecosystem you don't fully understand yet. It adds a layer of tension you don't get in simpler isekai power fantasies.