The big initial items might be tires. Depending on when they were last replaced.
I haven't found maintenance to be that significant. Diesels are pretty reliable and require oil changes 2-4x less often. My cummins ISL (425 hp/1250lb) only needs an oil change every 20k miles.
The suspensions might need some attention for airbags at some point but rarely.
Otherwise, it's the occasional air filters, air dryer filters, genset oil/air filters, chassis lube jobs, etc.
I haven't found maintenance to be that significant. Diesels are pretty reliable and require oil changes 2-4x less often. My cummins ISL (425 hp/1250lb) only needs an oil change every 20k miles.
The suspensions might need some attention for airbags at some point but rarely.
Otherwise, it's the occasional air filters, air dryer filters, genset oil/air filters, chassis lube jobs, etc.