On the growth of your operation...Probably much depends on your circumstances and lifestyle..of course, you get economy of scale with multiple units in one structure (one mortgage, one insurance bill, tax bill, one roof, one lawn, one parking lot/driveway, etc), so a fourplex  gives you even more scale than the duplex (or your question may even be about 5 plus units)..

They say that it is the worlds largest Yogurt manufacturing facility. 

Pretty much all manufacturers have a shaker line.

I am finding properties that meet this rule, but they are pretty much all manufactured.   

But Fremont may actually be the future Detroit.http://www.mercurynews.com/business/ci_26529194/te...Tesla's car manufacturing plant is based in Fremont.

Further complicating things is that many of my properties are manufactured homes which some banks will not lend on (despite the fact they are beautiful homes generating $2-3k in rent per month each).     

We also do not finance vacant land (lot loans), manufactured homes (mobile homes), working farms, or condotels (condos that rent rooms on short-term leases or are located in hotels).

Are there any other manufacturers that provide smooth beaded 9.25 or 7.25 product?

He calls the inspection in and the inspector fails him because he didn’t use the correct nails the manufacture of the hanger specifies.

Scale is usually achieved at 75 doors or more in size.