Measure the length times the with of your junk. A 5ft. x 5ft. is 25 square feet. That is a typical load.
look up the price of the all the materials at a hardware store, that will give you an idea of the material cost.
Only if you are 100% sure that you bought all the supplies for the job., reshopping cost extra.
Yes we have insurance and are licensed.
Demolition requires breaking walls and structures. Junk Hauling is picking up the material off the floor.