From my smaller perspective as someone relatively new to both reloading and casting, I'd say it's very important to find a casting setup that works for you. It doesn't have to be fancy, just accommodating to your needs, comfortable to operate, safe, and stable. I wouldn't want to say you should go entirely on instinct, but just make sure that everything you set up is accessible and stable. For me, covering work surfaces in cardboard followed by dollar store aluminum pans. I don't really have space for dropping boolits into cold water but I've experienced no issues with just letting them all air cool.