don't know the official name, but a shop house is what i would call it...
looking at a 50x100 red iron steel building with 1/2 finished as house (50x50), and the other 1/2 as shop... 16' sidewalls with a 14' door along with smaller ones in the shop, and 5000 finished square feet (2 story) on the house side... will have floor heat and all insulated with floor drains in the shop...
You may find out that will the full foundation that should be put in steel bldg. that this may not be as cheap as you think. 5000 sq ft @
$ 40 to $ 50 - sq ft you are looking at $ 200,000.00 to $ 250,000.00 for the insulated shell and then you will still have to finish out the interior house portion
I believe most of the shop/house buildings you see use wood pole barns that don't have a foundation just a interior slab and many areas will not allow for living areas