, but your interior maintenance is not covered as far as I know. 

An important clarification is that I would want the inspection report provided to me to be from a reputable 3rd party that would not be unduly influenced by the turnkey company that would be hiring them.  

The unit goes as high as $96,000 for a great condition interior, and rents for $1200/month with hot water included.  

Shouldn't cost that much especially if the lines are run along the interior walls.

They will also check all common areas of the interior.

19 Year Old Who has always had a passion for interior design and other aspects of home design such as floor plans and home remodel.

There may only be a small penalty (if any) depending on when the loan was underwritten and/or the type of loan it is - which could definitely influence your decision on whether to buy the asset (and how much you want to pay for it).

I plan on investing about 120k interior.

Being exposed to HAR, CAD's, TREC, and interacting with a countless number of Agents and Loan Officers has greatly influenced my decision to take the RE path.A couple of colleagues put me on to the BP Podcast which grabbed my attention the very first episode and here we are a week away from me taking the exam. 

You shouldn't need a permit to add an interior wall.