Run the cable however you wish.... if all the cable and the mount is there, I can almost guarantee you that the technician will be so happy to get out of the cold so quickly that he will gladly use your setup regardless of whether or not the ground is iffy. Offer to sign off liability (which only exists by law, having a Dish grounded serves almost no purpose other than keeping insurance company inspectors from wrongfully blaming house fires on it). Dish would still be responsible for damages if that is what the inspector decided, but the technician would have his C.Y.A.....If your house never catches on fire, none of this will ever be an issue anyway.
Some of the guys here seem to believe that all technicians take all these "rules" as seriously as they do.... I'm not going to trivialize the "rules" here... I've already made it clear before how silly I think some of them are... just giving you the facts. The majority of installers are not like the ones posting in these forums. Good or bad... whatever.... they'll get your install done... and with your own wiring and mount, you will be happy with your system.
Some of the guys here seem to believe that all technicians take all these "rules" as seriously as they do.... I'm not going to trivialize the "rules" here... I've already made it clear before how silly I think some of them are... just giving you the facts. The majority of installers are not like the ones posting in these forums. Good or bad... whatever.... they'll get your install done... and with your own wiring and mount, you will be happy with your system.