I would take a hose, run water along the area where the leak was found.  

Disconnect garden hoses from the house to prevent frozen water lines and flooded basements.2.

Stains can wear well or not, depending on the quality of the product and how it was applied.We don't pressure wash wood decks, instead, we prefer to use a good hose sprayer and a deck brush.

If you get HOSED and get and pay an extra 2-3% you’re talking about $200/mo at the worst.

Like a fire hose....blasting him in the face...

I would think you could run the hose up to the second floor and the first but not sure if you could get one condenser that would do the whole house at the same time. 

You might also take this time, as a reminder, to change the batteries in your thermostat, replace your furnace filter, and clear your air vents to ensure your unit is working to the best of its ability.4) This is also a good time to disconnect your exterior hoses. 5) It is also now time to change the batteries in your smoke detectors.

Basically, hook up a jet nozzle ($3-5 @ box stores)  to a garden hose, then let the jet "drill" under the concrete. 

This mainly cools one room, although using fans you can often push it to other rooms.Portable AC - The unit sits on the floor in a room and has a hose that goes out the window.

You don't want someone bringing in lower quality hoses.