Mod tools only became necessary when communities became larger. I'm sure you'll be fine with what's available when most communities start off small. Hell the Star wars prequel/sequel memes subs actually combined into one sub to keep their communities big enough to survive off Reddit and they're doing just fine.
I appreciate your optimism, but I've run the numbers and that's always a sticking point. It might be a tenth of the subscribers that move over, but it'll be a 20th of the number of mods that move over. And I moderate a rowdy bunch!