(Unlikely that an office or industrial tenant would consider funding repairs which are typically an owner expense.)1) Definition of NNN - We sometimes in our conversations with Tenants use the term "Absolute Net” just to make it clear in our discussions that we are expecting the Tenant to pay for ALL of the expenses.

I would never do commercial real estate (retail, office space, warehouses) because of the recession risk. 

Don't know about NY but here in Texas the Consumer Protection Division of the Attorney General's office handles tenant complaints.

Our office does risk management planning and that is what your question delves into.  

He has held the mail with the post office for a week.

In response to Rondi's comment about a door in your home office-- I would consult IRS publication 587 for a definitional framework of "exclusive use" for your home office for conducting business.

This will take time as you will likely start off in a lower office position but work your way up.

Also, if you maintain an office open to the public, you could accept rent that way.

Print out a letter and an address label, wear gloves every step of the process and don't buy the stamp at the post office if you want to be anonymous.

I know in TN it was somewhat costly to hang your license in a Broker's office.