The underwriter will require this home be superior in nature to the "exiting" home for a reason to build as a primary.

(The time frame for this was extended due to a natural disaster extension provided by the IRS.

And, I am not going to go through the FCRA compliance procedures.

Look to your lease too to see if it imposes greater procedural requirements on you to give the tenant notice to cure a curable violation. 

For a deal of this nature, which parties from my Work Network need to be involved?

And in coming to this point as a natural earthy mama and many years of midwives, home births, La Leche League meetings/many years of nursing my kiddos on cue.....  

Well, when it comes to filing taxes I usually don't rely on the kindness of strangers (especially when they have no liability), but if you think getting a lot of replies (some conflicting) will help you make up your mind - Have at it.Honestly, am not trying to be a jerk (as you can see it comes naturally), but your tax guy is the best liability shield against the IRS you have. 

The window must have a net clear openable area of 5.7 square feet (5.0 square feet if ground floor), a minimum openable height of 24 inches, a minimum openable width of 20 inches, and the bottom of the opening must be within 44 inches of the floor.Size: The room must be at least 70 square feet, and no less than 7 feet in any horizontal dimension.Lighting & Ventilation: A natural light source (window) of not less than 8% of the floor area and natural ventilation (openable window/door) of at least 4% of the floor area are required.Heating: The bedroom must have heating capable of maintaining a minimum room temperature of 68°F.Smoke Detector: A smoke detector is required in each sleeping room.While a closet is expected in most bedrooms, the International Residential Code does not actually require a bedroom to have a closet.

And trying to set up my SOP (standard operation procedure) for me.

Light color makes the rooms seem larger and natural wood looks good.It's tricky to get a really good even stain.