The communities I've seen have had rural style asphalt roads and look pretty straightforward.

The second  problem is it is difficult to find people who will do preparation of the land for the mobile hand ,and also  I don't really know what is better/easier/cheaper...putting concrete pillars in the ground every 8 feet or putting down an asphalt or concrete slab.

Surface- Rock or hard surface (concrete/asphalt);If on rock/asphalt put your tongue leg or stabilizer pads on widerpads to spread the weight out.

For example the driveway would be a "public municipal" road and have to be built to "road standards" such as 8' base and 8" pavement. 

The combined costs for grading, surplus disposal, gravel base, asphalt, curb and gutter, manholes, sewer laterals, and sidewalks could easily be $200 per linear foot for a 20' wide street.

Construction materials: Frame, no basement, roof: asphalt shingles, Floor: Carpet on stairs and bedrooms, LVP: Kitchen and living room.

The insurance check is based on replacing asphalt shingles.

Then, think of only buying houses etc. in the fire zones that are made out of concrete and steel and cinder blocks, without asphalt or wooden shingles.

- rock, concrete, asphalt, Security $10,000, Electric/lighting $8,000; Other $10,000;  This is in the countryside so no engineering cost.Below is a layout.

I would like to get a quote for insurance.6 unit single story building.  1960's construction, all brick exterior, cement slab, and new asphalt shingle roof.