All your mechanical will be about the same as if you were building a much larger house. $120k for 200 sqft seems reasonable. 

@V.G Jason:  You know what, there is only one guy in America that teaches physics, there is only one guy in America that is an auto mechanic and there is only one guy in America that understands Creative Financing and warns people about it.

This far the mechanics of what he is doing are clear to me.

My educational background is in science, but my personal background is rooted in the Midwest where I grew up on a farm and gained a skillset in everything mechanical. 

U want an attorney NOW to explain to you in detail the laws surrounding how the mechanics work.

It's always here, but I am caught ethically in my mind between protecting (some would say overprotecting) new investors from obvious pitch mechanisms and trying to get these posts kicked or saying, if they can't see the reverse trolling, it's out of my hands.

I “cash flow” about $7,000/month but because I’m not mechanically inclined I source out my maintenance which costs me roughly $4,000 of my cash flow each month.

Does the tax code say this directly or is this inferred from the mechanics of the bonus depreciation calculation?

The reason for this is because most mechanicals electric plumbing are more in line with today's code, and a lot of these properties typically need more cosmetic type of rehab.

Cash flow is more of a mechanism of leverage.