Dear Sir/Madam:
I am interested in your work post, I am a software developer specialized in business systems since 90s.
I offer you given the fact you state, to do it in Joomla 3+Virtuemart for e-commerce. It is simpler than other CMS round there, it has extensions for everything out there, open source and a well tested base system.
Easily to upgrade, modify, dashboard ready, I just need to make your site, and let me offer another task for free, like mail and server install.
Ready for Mobile as well as PC and tablets.
Design: I am bilingual English and Spanish writer and translator as well as Idea art and Minimalist Art digital painter/photograph, in order to get the best, I could help on it for free if necessary.
Also I want to say that I am to work in exclusive for you up to finish the system.
Thank you for reading my proposal.
Sincerely yours.