Depending on the oak cabinets condition if they have zero damage they can be restained if needed (same for the cabinets in the bathrooms).You or a handyman can repair a chipped porcelain tub:  https://homeguides.sfgate.com/repair-chipped-porcelain-tub-25470.htmlDefinitely a new door on the standing shower.

Plus if you get a bad tenant they can do 5k in damage no problem.  

Turnkey companies that have experience and a good track record should never warranty tenant caused damage.

I was thinking of asking for a key or having the unit owner sign a document releasing me from any liability or damage that is caused by my inability to access the utility room.  

Read the fine print in the foundation repair contract: Damages to the property, interior and exterior as a result of the foundation movement are not covered, during and after works completion.

Be sure there is no damage and like @Justin Fox said, if the neighborhood can't support your improvements then don't do it.

During the last visit we noticed some damages that were not visible previously. 

There are signs of some water damage. 

It really just depends on the amount of damage.

In a different matter: I tried getting a new construction house a few blocks away it's a new 2018 construction 3. 2. 1400sq with 4 parking spots.