I pay a little extra for audit defense in case I’m ever audited.

That being said the IRS doesn't "check" but if your audited they could find out and get you in trouble. 

I have 9 rental properties and pay a tax attorney $800 per year to prepare the taxes, but every year it seems that I find a few mistakes like mortgage interest not deducted on one property and insurance not deducted on another.I had assumed that for $800, someone was spending 4 hours entering my information and going through things to make sure I was getting all the deductions I was entitled to as well as preparing things so as to minimize the chances of an audit. 

(And to the IRS, should you get audited, but that is a different conversation.)John Hyre is more than an attorney and an investor.

I suspect one could ask for audited financials for each project ? 

With a nationally recognized CPA firm, annual audits and a reputable fund administrator, you would meet the minimum requirements for many investors.A strong CFO will not only bring financing expertise, but also strong risk management through adequate internal controls.

I guess my greatest beef with most gurus (not all, some are actually honest and straightforward, and even offer marginally beneficial advice) is the following1- they’re dishonest in numerous ways2- completing their training in no way qualifies the student to earn money or even perform competently in real property field3- the techniques they teach are often harmful to the people their students deal with4- they unleash a horde of unprepared, unqualified, unknowledgeable, misguided and unaware newbies on an unsuspecting pool of desperate homeowners5- they sell the song that all formal education is a waste of time and money6- they never provide any audited proof that they have been successful in real estate investing7- they encourage people to pay for a mentorship plan they can’t afford by increasing the limit on their credit cards8- they create falsified accounts to post how great their program is9- their programs are packaged by professional seminar companies out of Provo, Utah or Las Vegas, Nevada10- they disparage people who have spent years accumulating the knowledge, experience and capital necessary to be successful in real estate11- SOME gurus teach techniques which are unethical, immoral and even illegal. 

Have you been audited before by IRS regarding a cost seg.?

Also, find out what fees you will incur with your provider as you may have to run an annual legal audit for each investment your checkbook llc holds.

I don’t know how well this will hold up in an IRS audit so be careful, but it seems like this level would be most appropriate for a residential property.