Comcast with Bolt and 3 Mini's Ota possible?

As the above says I'm thinking about switching to Comcast. I assume I can use my Bolt as DVR and STB, along with the Mini's. With the Cable Card will I be able to watch all the Channels on all the Mini's and IS it possible to record from OTA and Comcast at the same time? I guess since it only has one input it's not possible.. Or even use the OTA and Cable at the same time? Thanx in advance..

My Ota will have a much Clearer picture than my Cable....Kinda would like to keep it.

Comcast with Bolt and 3 Mini's Ota possible?