I also don't think they are customers. 

An activity is a rental activity if tangible property (real or personal) is used by customers or held for use by customers, and the gross income (or expected gross income) from the activity represents amounts paid (or to be paid) mainly for the use of the property.

Contractors live in fear of this because it sticks on their record forever when a new potential customer looks them up. 

Are they handling most of the interior design and finish selection, i.e. picking out the white oak flooring and designing the custom built-ins in the study?

The condo includes high-quality granite countertops, custom cabinetry and wood floors.

All to create a fantastic learning experience, and give professional customer service.

You just have to use custom documents. 

Our tenants have been insurance burn outs ( their house burnt down insurance is paying the rent) to those building Custom homes that will take 12 to 18 months..

I sent a few e-mails to his customer service about this problem.

How customized are the buildings?