A few inches of ruined carpet at the doorway and the entire room of carpet must be replaced.There is no way to get rid of the smell of cat urine.

Cut off a six inch length and only use WET.

(This was an old house which originally had a septic field—this pipe was cast iron and was larger than any I had at any other house—I recall it was ~8 inches in diameter).

My question is how can I best organize the deductions so I'm not just handing my tax guy a four inch thick folder of Home Depot receipts?

You will not get any cracks in your grout lines and my preference is larger sized rectified tiles which can be installed with 1/16 inch grout lines. 

Every kitchen or apartment varies but on a recent job it was two upper 33x30's in the laundry room,  36" vanity + filler, 48" vanity plus filler, and a galley kitchen that was 112" long by 92" inch high and we did uppers and lowers for both sides.

It was a freaking waterfall, if there hadn't been floor drains in the middle of the house it would have been really bad luckily it was only 4 or 5 inches deep.

If you have inches or feet of water (we had four feet when we were flooded), you'll have to remove sheetrock and insulation and the repairs are more extensive and time consuming.  

He needs to cut out a few inches of existing drywall to fit in the new sheets.

Todays high capacity pump,,,fast dump washers will work on an inch and a half but things have to be perfect condition to do so.  2" is the 'modern' size to take the volume.