A nail down hardwood with its coats of poly gives ppl a better chance to clean it up.

Breaking RE materials down for 2 or 3 houses like roofing nails or sheet rock would be silly, even 20 houses a year, maybe at 200 or at 2,000 units there might be a difference.The more you try to learn on your own in finance and accounting the greater the chance that you'll mess up, you don't need to go past Accounting 101 and 102, bookkeeping and preparation of a budget, income statement and balance sheet, from there that's all you'll really need for what you'll be doing, IMO.

You nailed it!

Are you buying the lumber and nails for the carpenters? 

If not, the new tenants may nail blankets over the windows.

First, I would purchase a piece of 1/8" birch plywood and adhere it to the side with liquid nail.  

To me, there's two numbers to really nail down for figuring out how many houses/years its going to take to leave a job.1) One number is the one that if I ever lost my job, I'd make as much or more from my rentals than the job and that I would be just fine.2) A number that if I hit, I can replace my income from income and then some and also make enough money so that I can continue to feed my growth as well.

@Jerry W. nailed it.Here's the thing, there are a million adages in this business and a million "rules." 

As Joshua stated, an O&E should nail that down.  

You can get nailed for interfering with the distribution of assets or probate, you need to stay clear if the estate has not been closed.