I'm doing MF street photography. I am a former digital shooter, converted to film due the way it looks and then to MF, because of the way it handles perspective and DOF. The carry around camera solution I found was to buy a MF rangefinder (well, I bought two). There are plenty of sweet folding 6x6 or 6x9s around, which are cheap, pocketable, silent and have very good optics, sometimes rivaling contemporary MF lenses.