Manufactured Building and Mobile Home Installers

Tasks largely resist digitisation. Crawling under a 16-by-76 box to shim a pier that's a quarter-inch low, torquing marriage-line lag bolts through misaligned rim joists, and dry-fitting a sewer crossover in a 30-inch crawl space are the day's core work — an 18 rather than 20 only because permit packets, HUD data plate paperwork, and set-crew scheduling are already moving to software.

Hands-on in uncontrolled environments. Every task happens on an unprepared lot in whatever weather the delivery day brings — mud, frost heave, slope, tight setbacks, a toter backing a half-section into place — and a 19 reflects that even the measuring and leveling is done by hand with a transit or water level under the frame, not from a screen.

Licensed human required and personally liable. Most states require a licensed or HUD-certified installer whose license number goes on the installation certificate, and a failed anchoring or leveling inspection traces back to that individual — it sits at 12 rather than 16 because the license is state-issued with reciprocity gaps, the manufacturer's setup manual dictates most of the method, and the retailer or GC often carries the bond.

Some relationship component. Repeat work comes from retailers and community operators who call the crew they know will set clean and pass inspection first time, but the homeowner meets the installer once for a day or two — a 9, not a 14, because the relationship is with the dealer, not the person living in the house.

Meaningful discretion. Real calls get made on site — whether soil bearing supports the pier spacing in the manual, whether to add blocking under a marriage wall opening, whether to refuse a set on saturated ground — but the HUD Model Installation Standards and the manufacturer's manual prescribe pier heights, anchor spacing, and torque, which caps this at 10.