You can certainly use the Note 3 on that plan. I am and it works great! That said, there's no financing available for any prepaid plans - financing comes with standard post-paid "pseudo-contract" plans. I paid $680 up front for my Note 3 on swappa, got it in 3 days, got my prepaid SIM switched out to a MicroSIM at the T-Mo store, popped it in the Note 3, and it came right up. I originally set up the prepaid plan on my AT&T Note 1 (SGH-I717) which I cancelled my AT&T contract on, unlocked, and took to the T-Mobile store to get a prepaid SIM for. They had no issues setting up the $30 plan on a new SIM for bring-your-own-device use.
Samsung Galaxy Note 3 SM-900T 32GB
Samsung Galaxy Note SGH-i717 16GB
HP TouchPad 32GB
Archos 43 Internet Tablet - 16GB + 32GB mSD
Dell Axim X50v - 128MB + 16GB CF