I don't see the need to buy a hero account. You just need to hire a professional Manager to manage your company. You can write PM for example yahoo62278. This is one of the best managers on the forum.
Actually, he could run a small signature campaign on his own. All he'd have to do is hire someone to run the escrow for him and release the payments and someone to make him a signature. There's nothing difficult in starting a campaign thread. Anybody could do it, especially that most campaigns just copy the rules from each other.
OP, like others have already told you, don't buy an account. You don't need to be a senior or a hero to run a campaign and promote your business. It's much better if you are honest from the start and open about who you are and what your goal is.