With SFH maybe 25 houses with laundromats possibly 2.Having a consultant is a great recommendation. 

Consult a lawyer.

Hey Chris,I've used Domicile Consulting LLC a couple times.

During an initial consultation with the CPA, the CPA said that the rent would have to be fair market value.

You should consult with a local attorney that specializes in landlord-tenant issues. 

Not advising you, just speaking from personal experienceIf you do a lot of real estate investing under your LLC, where its a fulltime business and get to the point where there's adequate regular income, you may want to consult with a CPA about the option of electing to have your LLC taxed as an S Corp and take a regular salary and any additional distributions as dividends. 

But you are ENTITLED to answers directly from the sellers' mouths if they want out, and why.If you can't work something out, then sure, consult your attorney.

I consult with 25+ real estate investors every month, and most of them are making a near zero return on their rentals, when you factor in repairs, vacancy, payments, etc...

You may consult one, but his fees are not usually recoverable.

A newbie question for all the experienced Rehabbers here -Do you usually hire a consultant for determining how to best use the space?