Plus the holding costs and permit costs if it’s more than paint/carpet.

You'll do this for everything in the home that requires replacement: interior paint (4 years), flooring (12 years if you use 12 mil LVP), roof (20 years), hot water heater (10 years), oven, washer, dryer, garbage disposal, microwave and so on. 

Spending $20k on exterior if windows roof and painting are needed will eat up costs pretty fastBest to itemize what needs to be done and then determine a rough estimated cost

I would just wait till they leave and do repairs , paint and do flooring for the next tenant . 

Some people just like To live that way- Messy class C of someone who is monitarily challenged.The working poor, that's why you should be judicious in choosing how you outfit the unit.Some will go with, for instance stone countertops (hard to damage), while others will go with formica (cheaper), And others will go with heavy duty paint (quick repairs on a turn) for countertops in a class C.

Those are all computer algorithms that can't take specific details into consideration like paint color, flooring, countertops, room layout, quality of neighbors, and many other factors.Use their numbers as a beginning analysis but then actually look at comparable rentals on the market and compare them to yours.

Any damage to the wallpaper, paint, walls, floors, carpeting, doors, windows, window treatments, light fixtures, appliances, or other improvements to the Property (to include burst water pipes due to freezing caused by neglect or carelessness of the Tenant, his family, or any of his guests), in excess of ordinary wear and tear, shall be promptly repaired or replaced by tenant, at Tenant’s sole expense, so as to restore the Property to the same condition as existed prior to the commencement of the Term.

Fix anything thats broke , give it a fresh coat of paint and rent it out . 

I've been in the apartment recently anyways and other than a little paint / drywall repair here and there, it doesn't need anything. 

For example, they are weird about chipping and peeling paint, missing handrails, etc.