I made this free web site as a calculator which we use now for all our quotes in a melbourne based fabrication company. https://www.steelquote.info Any questions, let me know.

Pour a footing and chemset, you wont get them in the right spot otherwise, cast-in plate is another option.

I started in sketchup, its great for concept, finished in a free student version of autocad, the only way to finalise plans accurately.

I was quoted $8000 by a drafts man and it had already been drawn in cad by me. I chose not to use him and draw it myself. My drawings have just been submitted to the surveyor with some help of my engineer, I am happy they were free.