And some of the posters are giving excellent feedback on the camera itself, but I'm looking at the camera AND what you'll be using it for (which is arguably more important). You're not doing occasional studio shoots, you're doing real estate videos, which means you'll be shooting a lot and very frequently. Battery life would also be a big issue in your case, since the internal battery lasts maybe an hour. Also consider that you won't be shooting real estate videos in 2.5K RAW, it's just going to slow you down way too much, so try and take that spec out of the equation and look at it as just 1080p ProRes.
It won't slow you down too much if you have the hardware to handle it. The hardware is not cheap, but neither is the c100. But if you try to cheap out on the hardware, RAW will make your workflow miserable if not impossible.
Why are you not not considering the 5D3? I feel like the only reason i would get a c100 is if i was going to do documentary stuff where i needed to handle tons of footage, run and gun, and not have to worry too much about low light performance.