The NNN covers most items and there isn't much else in the warehouse that can fail.  

@Benjamin CowlesYou can have the tenant be responsible for general maintenance (lawn care and such) and minor repairs on plumbing and appliances.It would make more sense for the owner to be responsible for roof/door/siding/HVAC replacements because those are capitalized items for your cost basis for depreciation and if the option is ever exercised...

Trouble for rent collectors (landlords) and mortgage premium collectors (banks)?

Second, you will likely find that a major CapEx item can substantially reduce your returns.

This covers your personal items such as clothes, furniture, etc. 

You are required to mail the tenant an itemized statement showing the expenses that you take out of his deposit.

or the units were to be closed.I am sure there are some checklist items we can conduct for a case like this. 

I am aware of Connected Investors and have been listening to them for several years but I have not spent any money on their items mainly because of my medical problems and my inability to work forc the last few years.Connected Investors has recently had a great deal for $297.00 that included all you would need and that using their automation could be done at home.

If the roof didn't already exist or you are improving the roof (upgraded materials/design, adding dog houses and dormers) then it could be capitalized.However, if it is just a repair/replacement, you could consider it a capital item because it's a project over a certain dollar threshold, with that threshold being set by the company you run and used on a consistent basis.

Since I am a plumber, I see many plumbing items today that are not done the same ways as in older homes.