Some will want to see it, but we have leased our unit twice without showing the property.

Next, if you do another VA mortgage, VA allows you to take your lease and offset your mortgage payment.

You share the lease, you share his payment history, and you give a total of what is owed.

I estimate high of what the bill would be and put it on their lease, I have not had any issues this way and if the water bill goes up, I will increase on the next lease. 

Signs of this are poor lease quality, maybe M2M tenants, high expenses (unnecessary things like high trash bills, internet, cleaning, security).

I am considering getting into some commercial investments and think I want to go down the NNN route. Are there any books or resources you can recommend to get me started with the basics?

Hey @Devon Moore not sure where or why you'd lean towards a land lease unless that's standard for this developer.In my experience its difficult to capitalize deals with ground leases involved.  

I am not sure if you are in an area where keeping the heat off could be a lease violation or you have that term in your lease.

I have solid commercial leases, but I am interested in what landlords request of prospective commercial tenants to do the due diligence?

A local lawyer approved lease worked for the tenants I chose; I took in rents on Apartments.com.