I'm new to TiVo - hoping you can help me. Looking at Roamio OTA VOX 1TB, have an antenna, and hotspot for internet. I'm wondering how much data a TiVo uses. Usually get 6-7 weeks with a 5GB card. Also, if I don't have "all in" will TiVo show the 24 hr (or so) program guide embedded in local broadcasting, or will there be NO guide w/o a subscription? Thanks so much!!