I know I'm hella late on this one, but I watched Wheeler Dealers, a Discovery show, for the first time last night. It was the episode where he buys a Porsche Boxter S for one thousand pounds (yes, they're British). At first, I was a little turned off by the short guy's shouty nature and obviously staged transactions, but enter: the tall guy with the funny hair. The mechanic on this show does a great job at explaining the processes of repairing the car and giving you an idea of the time and equipment needed to perform it. The scenes of him fixing the automatic transmission and installing the exhaust on the Boxster was excellent. 9/10 will watch again.
TL;DR: Want to flip cars? Watch other people do it.