Congrats on the new rig!
I've got a lot of respect for Puma, I have friends that use their product and they all seemed well built.
Like Old Biscuit states, a packing of bearings, brake service and adjustment would definitely be on top of the maintenance schedule. It is all a fairly easy DIY job and if your Dad has experience, he can probably lead you through it.
Another task that would be on my maintenance schedule (and it is), is to perform a pressurized interior leak test. It's another easy DIY job that involves pushing air inside the trailer and spraying the outside with a soap solution. The pressure test will discover even any tiny leak spots. You really want to inspect your new rig for any possible leaks. Water is like cancer to our travel trailers.
Good luck with the new trailer!