I've research and followed articles on rent to own, as a way to unload my rental properties when I fully retire.

Does she want to buy a property and then turn around and unload it via seller financing?  

It's been for sale and vacant for so long I feel they have to be ready to unload it.

What I have found in my area (Northern Virgina) is that HD will only give the 10% discount to things in a box but not to lumber, concete board, etc.

The gentleman selling seem to have so personal issues going on an needs to unload his rentals. 

How long does it take for you to unload them and how many have you done?  

What is the usual discount for lumber, cabinets, shingles, plumbing, and electrical?

I have packages to unload.

Then I put my box truck in the driveway, let them load it up, and move the truck to the storage unit and let them unload as many times as necessary until all the "collectibles" are safely stored.

A paid employee may act on behalf of the company and most likely will not need a license, you'll need to how all the requirements for a paid employee, commission only  might cut it f you're meeting all the other requirements for an employee.Again,  anytime someone on here mentions "Agent" or "Broker" or "license" the assumption goes straight to real  estate agency........that is not correct entirely, the formation of agency relationships is formed by law,  has little to do with a real estate agent, you can be an agent to buy a car,  truck load of shoes, trees or lumber, just about anything and the "Laws of Agency" apply to these relationships.If you have a formal written partnership with A and B then you may skate  past the license matter as both are buying, they must close together,  then B may sell their interest to A and walk off.