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. 

.- Block and neighborhood safety and amenities (can they walk to a grocery store, for example).I don't think you have to limit yourself to "white collar". 

I have a property I am trying to sell and the buyers want to close 6 months from now when they are good and ready to move in and would like to keep their inspection contingency until then in case there is any spring water damage or something else happens between now and then.

Even if you mess everything up, there is only so much damage you're going to do with a light cosmetic flip.

It usually only works when you're able to buy large blocks of sponsor units and flip them when units open up.

If I know they aren't available on a certain date, I try and get my checkout days for when cleaners are back or even block that day (in off season) My wife can go clean house in a jam.