Hi, my name is Gustav and i am a structural engineer. I can do your Q1, Q2 nad Q3. But my budget is $30,00 + $5,00 (freelancer fee), making $10,00 for question. If you still need help send me a message and we can work on details. My experience and theoric background allows me to do it in 36 hours.
Thanks for the offer;
Gustav
Structural Engineer.