A lot of people think of real estate this way.
That they need someone to help them "make it a business" and want an entity to "operate a business". The truth is you either are or aren't a business either way.
A business for tax intentions is defined in code section 162-and is basically the continuous and ongoing involvement for profit.
Almost all rentals are technically a business, and your rentals are allowed to deduct the same qualifying business expenses with or without an LLC or an entity.
That being said I do understand what you're saying which is that you're looking for someone to help you treat this like a business-get all your ducks in a row, grow it, etc.
The license IMO isn't the biggest factor at all. I have clients who are CPAs and pay me to do their taxes.
The most important factors:
-They are real estate specialized
-They have an actual history/ foundation in tax. Looked into someone's history/look on linked in. Many people just "start doing tax" or buy a tax firm and then copy+repeat the same information they hear actual experts talk about without actually knowing any of it themselves. Social media has unfortunately made it way too easy to present as an expert even when someone isn't.
-They focus on tax planning/strategy and not just tax filing.