Normally they would mix the concrete by hand. 

Glad I didn't follow the guideline that book quoted above. 

The HUD guidelines suggest a certain rent amount, but after inspections, the figure came back significantly lower than expected.Additionally, do you have any general tips for working within the bureaucracy of the Section 8 program?

In many places, commercial leases have different guidelines than residential, so it might not require 120 days.

We usually redo the concrete walks or steps if they are old, graying and in need of repair.

There is statutory, and as you pointed out, now Fannie/Freddie guidelines, that exempt many transfers from being subject to the Due On Sale Clause...asset protection/estate planning purposes are covered.

So yes, you can have solid concrete walls, it's still going to burn down.I have read that worst case up to 80 million Americans will relocate in the next three decades.

Basically a concrete slab with pillars, hurricane tie downs and skirting with axle removed. 

Nothing worse than walking up the front of the house and having a broken up concrete walkway.

I have received recent quotes for LESTER building around 125k for a 40x80 so I'm doubling that , concrete not included.I feel like i can't loose with this strategy even charging $2 a square triple net for these units ?