Thankfully I'm in Ohio which has actually added a chapter and language to the revised code in an attempt to prevent cities from implementing policies that institute rent control or rent stabilization in any form.

Or is it simply cosmetic or preventative or an upgrade?

With this said, I would never do this for a rental so this is a rental (tenant moved out) that I plan on selling using a 1031 exchange on soon and the garage floor has lots of cracks and stains so I want to make the floor look nicer.  

Will this prevent me from saving for the down payment for the future house?

This prevents Amy confusion about different leases, agreements, etc.

As others have stated, a well-drafted LLC operating agreement should have language that would prevent management from withholding material facts and/or removal provisions for a manager who doesn't comply.

I have them all replaced. 2. curtains/drapes are stained with food and whatever red, purple color. 3.

Insurance is to prevent loss, not provide profit.  

Repairs needed, conditon of the property, preventative maintenance needed throughout the year and who will handle4.

If you are in a neighborhood with a higher crime rate (C neighborhood), make sure to protect the AC units by putting a cage over them to prevent theft.