If you are doing that kind of work then you absolutely want to have 2 separate dedicated lines for cable and satellite TV. They should both be RG6 coax. The cable line should go to a wall plate with a tiny button or switch which is the power supply for the OTA TV antenna and will distribute that throughout the TV's in the coach. When you turn off that little button/switch then the cable signal would be distributed the same way.
The satellite coax will be run directly to where you will have the 1 satellite receiver. If you want to watch 2 different channels on 2 different TV's at the same time you will need 2 separate receivers and the wiring is just a tad different. Let me know if you want to add that to your plans.