I run into a similar situation when the mobile home owner (and sometimes at a mobile home park) locates the service disconnect further than 30 feet and/or not in sight of the home.
The answer to this is to follow 550.32(A) and install another disconnect that is service entrance rated. Then go to 250.32 & pick one of the options based on new installation/existing installation. Generally, the easiest would be to install a 4 wire feeder (required if new construction), splice the neutral at the second disconnect & insulate it, use the neutral bar to land the equipment grounds (install the bonding jumper), install grounding electrodes & connect to the equipment ground, install 4 wire feeder to mobile home, send invoice to owner.
Grounding & bonding at the meter pack would be handled by installing the required electrodes & MBJ if the neutral is not factory bonded to the enclosure.
