How would this affect my ability to take advantage of all the good tax benefits of rental property?  

There are many more (I didn't even mention seller financing and then OPM for rehab costs) I think you would benefit greatly if you took a little more time to learn.

I am curious to hear if there are attorney/brokers out there and if they know of what the possible benefits but also the pitfalls, ethical issues, and downsides are of becoming a broker as an attorney.

create a power point with what you're looking to do and let them know that you could split the deal with you doing all the work, but them sharing the benefits with a 50% investment. 

The new Section 199A tax deduction slightly benefits LLCs over S-corporations because the deduction applies to more (with an S-corporation, if you take money out of the business you first have to take a "reasonable compensation" that does not could for the 199A deduction). 

it sounded to me like their biggest benefit was that if you tied up properties under their requirements, they had the buyer lined up and you would earn a fee, but if you build a good buyers list, you could do that and not have to give them 7000.

Engage one another, so we can all benefit!

Be a wholesaler who has specialized knowledge in the benefits of one type of investment property and has an inventory or source for this kind of proprty and can move it quickly.

It is always better if they are not listed but to create a steady listed properties are a huge benefit.

FHA is making a come back and people are really starting to realize the benefit. 3% down, gift funds allowed, non-occupying co-borrowers and on and on.