zz.building a bench with roof

Below is a diagram and basic outline of what it would take to build a 4 or 5 seat,
"c" shaped bench structure  with a 6ft high, “load bearing” or roof-supporting
wall behind it, covered by a wide overhanging sloped tiled roof.

Materials:
-Clay-rich earth or “red  dirt” can be dug out of ground at the site, 
or it can be delivered by truck for approximately $300.

-Sand can be collected from a nearby creek or river with pickup truck 
and shovels (several loads)or a whole dump truck load can be delivered 
for approximately $300.

-Straw or other long grass material can be cut from vicinity or can be 
purchased from retail establishments such as Home Depot, Lowes or Walmart 
for $50.

-Stones for foundation can be collected from nearby creek bed or bought 
from a garden supply store for approx $100

-Plaster materials (limestone,linseed oil,pulp,mesh) $60

-Roofing materials (lumber, and tiles) - to be determined.

-Rental of tools for digging and buckets for carrying.$50 
(Atlanta Tool Bank)

-Food or refreshments to feed volunteers with. - to be determined.

Total for materials: Up to $850 plus roofing and food costs.

Labor: 
-including project management, managing volunteers, and other skilled 
and non skilled labor to prepare for the event and finish the structure 
after the event. This does not include the man hours of the volunteers
who come out on the day of the event. The breakdown is as follows:

Before the event: 
total approx man hours = 150 or 3 people x 50hrs.
-site visit and creating final design plan, 
-coordinating the procurement and delivery of materials at the building 
site, 
-laying/placing stones for foundation of structure, 
-digging the mixing pit area out of the ground with a pick and shovel, 
-making “bricks” for the event, 
-making plaster for finish coat, 
-preparing the earthen building mixture for the event.

At the event: 
16 man hours. 2 people for the day.
To lead the participants through the process of building the structure 
by laying down the pre-made bricks and mortaring them together with the 
earthen mixture in the pit. 

After the event: 
12 man hrs or 3 people x 4 hrs to:
finish whatever is not completed on the day of the event and to apply 
protective plaster finish.  

total man hours = approx 180 hrs. Plus time for carpenter/roofing specialist 
to complete roof. (to be determined)