I capture the receipts as soon as I leave a home improvement store and it has saved my butt because those receipts pile up fast when you're in active renovation on multiple properties. 

Whether we agree with these items or not, the following are inflationary government policies: stimulus, student debt relief, tariffs, increased child tax credits, limited immigration, and big government deficit spending.

I then would have my tax cpa enter in or do it after discussing tax based items (depreciation- MACRS, reserves, year end accruals, reserves, etc.).

Eric,Without going into too much detail on each line item, at first I use my back of the napkin method with a 40-50% expense ratio.

It's nothing like fancy pants hanging around kitchen stores picking out just the right cabinet door and handle pulls.

You can get some estimates from contractors for what they charge for big ticket items like to renovate a bathroom, renovate a kitchen, replace the furnace, replace the roof, etc.All wholesale deals should have free and clear title and you should be able to see the sales agreement before submitting the earnest money deposit.

The AP has to be open, notorious and hostile...those terms have a legal meaning and essentially it is that you as the owner have been fully deprived of your right to the property.Absent those items above, it sounds like at best they have another legal right which is a "prescriptive easement".

Then at the court you will be the "prosecutor" and must out line the violations according to the lease, and show the efforts you gave your tenant to solve those items.3.  

Again, the BiggerPockets store has some books on this topic, or you can learn about it by watching podcasts, reading blogs, and interacting on the forum.

But, there are certainly several items that would give me pause.