Im sadly here to tell you that under audit, and we have 100s of court cases to back this up, that this WILL NOT FLY.

But if you have commercial type loans, you may not have much of a choice and HELOCs do not count when you are under audit.

It's not common (because audits are rare), but this type of reclassification does happen and is messy when it does. 

I have CPAs for tax questions and taking care of the LLC returns, as well as for any "random" state audits of the LLC (which do happen - they claim they are random, but they are looking for LLCs not paying state unemployment taxes).That's all I have needed for over a decade of being a part of multiple different business ventures. 

A distinct LLC for management establishes a record-keeping division between property ownership and management activities, which may be useful for bookkeeping and upcoming audits, even though income still flows through to you.

And during the Audit the auditor thought my wife was buying gooddies for us personally and dissallowed anything related to the London Trip and the trip to Tel Aviv where again I have clients and had business meetings..

Is it a reputable company and will the documentation provided from the study hold up in an audit?

The home office deduction is ripe for an audit. 

The risk is high that they will be recategorized by the IRS upon audit or examination, which means that you've overcontributed to a retirement plan. 

Education and research hours, "managing the property manager" all have failed under audit historically.There is a lot more nuance here I could go into, but I would strongly advice you talk with a real estate-focused tax professional.