Nicole, you can always create proxies. Use Lightroom or ACR or RAW Therapee to batch process (transcode) your footage
1. Downconvert to 1920x1080 (or even 1280x720) JPEG
2. Change to 8-bit
3. Color space Rec. 709
4. Low quality setting (you'll be surprised how good this is)
Edit using proxies. Once you've locked your edit you can apply the edit to the DNG files and you'll have a locked DNG image sequence ready when you are to color grade it.
If your final video is only a few minutes long, there's no reason why you can't color grade it with Lightroom or Raw therapee - I have a feeling they will give better results than Resolve.
I used this exact process to work with the free DNG files supplied by John yesterday on the BM forum. There's nothing stopping you from working on it with your current setup.
By the way - RAID is not a storage or backup solution. It's a 'storage and backup
while you work solution'. For storage just use regular disks - internal or external.
Hope this helps.
http://wolfcrow.com/blog/ - Workflow information and support for filmmakers, photographers, audiographers and videographers.