Hello. I have read your description and also read through the power point presentation. I understand you want the site to be created and inspired from apparatusstudio.com. I understand you're wanting to use the themeforest theme but it might be best to use a framework instead - such as bones, etc. The reason I say this is because of performance and security (future updates - at times sellers abandon themes on themeforest and there is nothing envato can do after that point to help). This would cause the theme to become out-dated, possibly break and open your site up to security risks - because you're wanting an eCommerce platform built that should be important for you. I have over four years experience as a WordPress developer and seven years in web design & development.
I have built it all in WordPress entirely from scratch and using parent themes, etc. I'd like to speak with you a little more to get some questions I have answered.
I look forward to hearing from you.
Thanks,
Robert