As Michael stated you can get more detailed with a cost segregation study to further breakdown the building value into the structural and necessary components that have 27.5 year depreciation schedule, land improvements have 15 year schedules and tangible personal property has a 5 (or 7) year schedule.

I'm confused about the part of this being a value-add commercial building (and a fairly big one, at that) being promoted/sold by a turnkey company.

Promote yourself as a LICENSED agent first. 

The TSP, like any other retirement account, is great until the stock market tanks and your money disappears because you didn't have it invested in a real, tangible asset. 

Cross-promotion.

Cross-promotion.

., been promoted, held a high level position at a large company, started your own business), you can leverage your track record and translate your skills into multifamilyThought leadership platform: create an interview-based podcast, blog, YouTube channel, start a meetup group.

Does anyone have any other options for me in which to promote my property or ways in which I can seek investors?

ROI measures things but you need to understand the tangibles, where ever you decide to plunk your money. 

I am wondering where you get flyers and how you send them out to promote yourself.