Have you had a chance to shake it down yet?
Also, here's a couple of good starting ideas.
Find a shop that specializes in your engine (cat or cummins??) Have them scan the engine control unit for issues and past events. Check the air filter, the fuel filter. Change the oil and start with a fresh filter.
Hopefully this same shop can look at the chassis too. Check the airbags, the air valves, and the compressor and dryer.
Have the brakes checked.
Go to a good truck tire shop, and have them look over all tires + put it on an alignment machine. Should cost around $250.
This is all just looking for stuff that could potentially leave you stranded or cause a failure you don't want
IF you have a norcold fridge... make darn sure it has the fire unit done already. If it's dometic, not sure on that one.
OH and if you can, have the oil and filter in the genset changed, and keep up with that carefully. people talk about every 1000 hours, but I change mine every 250 hours - and she purrs like a kitten.
Maybe you're already an experienced RV'r and this whole message was not needed - but if not, these are good things to start fresh with