When contractors buy from Home Depot, they pay 125 which includes a markup and limitations in sizing, but Crystal manufactures their own so no frame ins.

before you pick up the cabinets from the manufacturer make sure all doors are straight and there is no 1/4' gab between them. just cut thru cardboard boxes and take a look. less pain afterwards with your installer.

The manufactures have charts that answers your question. 

I like Schlage but any of the major manufactures will work as long as the entire until is the same brand (and therefore same keyway).  

One thing we never lost was culture, we are seeing a massive renaissance in our communities across the entire Greater Cleveland Area.Yes, we have amazing infrastructure stretching from anchor facilities such as major medical systems with integrated learning and university elements, public transportation, family friendly, arts, sciences, manufacturing, easy highway access, coastal neighborhoods, new modernized port facilities, mining, fortune 500 companies and much much more.  

George Allen can help direct you to new home manufacturers that specialize is what is called "Community Series Homes" and has other knowledge and expertise for community owners.

Then I moved on to manufactured homes. 

I´m not familiar with any service that tells you the proportion of multi-families vs single families vs townhomes vs manufactured homes in a particular area - that just comes down to local knowledge.I´m based overseas so do most of my research remotely as well, but as @Michael Haynes alluded to above, you really need boots on the ground to be successful.

Tread lightly on assuming the the legislative bodies, MH manufacturers, MH dealership networks, et.al. will sit around idly waiting for someone to come along and try to replace MH's in MHC's with anything other than MH's.

The modular manufacturer if you can find one to build what you want probably won't care.