I did similar when I started playing on Feathermoon, but then I wasn't moving realms. And I did the same when I made a twink on Sisters of Elune for the 29s bracket, but then I only leveled the one character and only to 29, though I still had to collect all the gear for twinking without a "main" on the realm. :/
So, I've done it multiple times and never felt compelled to purchase a realm transfer. With account-bound mounts/pets/etc. now I feel even less so.