On one hand I am an ethical person so I feel that if they ask me to I should do just that for the integrity of my business, however, I have a sales background so I know persistence is key.

(I have no idea how to actually make this link correctly), my feelings weren't hurt, but I am big on integrity and it did feel like a set up to question my integrity.  

You claim to do business with Integrity and Transparency.

As is the case with any professional service, the quality of their work is directly tied to their experience and integrity, so selecting a qualified engineer plays a big part in the validity of the findings presented and used in the report they produce.Many Cost Segregation companies offer a "benchmark" study free of charge which will provide a conservative estimate of how much accelerated depreciation will come from segregating depreciable assets.

As for Property Managers - the quality and integrity varies a lot, but we help our clients connect with reputable PMs.

Any such system would compromise the structural integrity as you alluded to.

I would integrate each one of these into your mailing campaign, hit them with a different mail piece each month.

For us, our materials are all part of an integrated program - so a person that gets our postcard and then sees our door hanger has no doubt they came from us and the messages are reinforced across all our materials.

If you can't/won't do this, or can't/won't stomach the (often harsh) rejections and slurs against your integrity, then save your money and try another method. 

My goal is to find those properties, keep the integrity of the neighborhood intact, and contribute to the increasing demand for housing.