First Upgrades
The higher wall corral upgrade is a must early in the game, especially once you have more than one type of slime on your ranch. It will ensure that you can keep more slimes safe, without them escaping and risking making Tarrs.
The auto-feeder is another helpful upgrade. Just keep it well-stocked with supplies from your farm and coop, and it will send a plentiful supply of food to your slimes.
The final early upgrade I recommend is the plort collector. This saves you having to venture inside the corrals to collect plorts. It’s especially helpful if you have rock slimes, as their spikes reduce your health if they bump into you.
Once you’ve got these basics down, you’re ready to explore further afield and see what else the Far Far Range has to offer.