Hey Itzquick....First of all WELCOME
Secondly....What is your wall height? Are they 10' with windows at the top? And is the 12' workshop in addition to the garage or is it going to be walled off inside the 30' x 36' footprint? And if it is, 24' garage is adequate but you will find that it is not really deep enough for some things. My garage is 28' deep and with my extended cab longbed I do not have quite enought room. But what you have so far is looking great. Be sure to keep us posted on the progress of it.