What is the rule of thumb for concrete finishing price and do this price covers the forming and gradeing?

how many cinder blocks would it take to build a 20x30 small fish market . With {2} standard windows in front {1} standard door in front and back,

What is the best roof for a fish market/fast food

What would be best is if you would kindly open your own post and not jump onto someone else's post. IUt confuses us old guys.