Welcome to the forum Mark, & best wishes for your Roadster build.
before i started my build i had the free use of an arc welder but after asking a similar question to yours i went with the general feeling that as a "new welder" that mig is the way to go,
i went on a free 11 week (2hrs each wednesday night) college course to learn the basics of welding, maybe your local technical college offers similar course,s?? maybe worth enquiring.
all the best
Andy
