Marty McLean, born 1997, is an Australian filmmaker interested in drama, horror and the human psyche. He has amassed a portfolio of short films, music videos and a web series over the past decade.
Great tips and a few ideas I haven't thought of!
It up to you. I have the 2014 model (bought new in 2015) with the same specs (except 500GB SSD) and I work with HD and 4K mostly in Avid and sometimes Premiere with no problems.
Buying a 2015 or 2016 model will give you extra room for longevity, but Macs last a lifetime and keep their resale value so you could get the 2013 model, resell and get something newer without too much of a loss.
Some of this stuff is pretty rad!