Also, consider the BMVA. It uses inexpensive SD cards so both cost and post-production work is less.
Not sure about Indie Guy's comment, but I run a C100 with the Blackmagic Video Assist and get HDMI uncompressed out to ProRes 4:2:2 10bit. Since the C100's native ISO is 800, you still get great exposure and color in your image. I too was in your same position where cost was an issue. The money I saved on this combo I could then afford another lens and lighting kit.