Thanks for chiming in, guys.
A site-survey tool is in the budget for next year. For the time being, I've gotta work with VisualRF and some drawings that I imported. I've got measurements and materials as well.
My main issue has been understanding what the exact power levels should be when mocking it up. Salvi, are you setting yours at 15dBm, then? Also, how does that affect your decision for setting your min/max EIRP levels in the ARM profile?