Maybe I misunderstand your comment and your first time hiring out the work, not doing a rehab.  

I do not have a misunderstanding or self-certified architects.

The nutshell misunderstanding here is what a POA is for and what it does.  

Quote from @Dan Huntzinger: You should always make changes in writing to avoid misunderstandings or disagreements.

I’ve found that to be a common assumption/misunderstanding throughout these forums threads, but it appears the ramifications are very different depend on which you choose.

I could be misunderstanding something here....

Please correct me if I misunderstand about the Personal Liability.  

There's a misunderstanding either on your part or your CPA's part.You absolutely can claim all expenses associated with the rental property. 

I remembered a few situations on BP podcasts where guests spoke about respectfully understanding the appraiser's methods, communicating your misunderstanding, and presenting appropriate data to support a revaluation.  

The color on porcelain does not go all the way through, this is a common misunderstanding.