DSLR's are cheaper than regular cinema or professional cameras. They always have been, so if you are trying to save cash, you will more than likely really NEED to look into DSLRs over something like an Arri or a Red camera. There's a pretty substantial difference.
First, plan out how much you are willing to spend, and then decide between renting or asking friends with the gear to help.
Renting will all be based on your number of shooting days needed.
I wouldn't go beyond that without hearing about your budget first.