well, you are going to buy the bot, and new wow account + the new expansion,, that's expensive and risky!
If you use the bot on the new account and transfer the character into your main account, keep in mind that you are risking your main account!
Blizz do track everything!
Also if you use HB its a 100% ban in the next month or so, its better not to use it or even install it in ur main PC.