Things have changed a bit in the past few years. You may need to schedule a paid PDI with Orvan, if that is the kind of work you want him to do. That may tie up your rig for a couple of days, in which case you may need to look for lodging in the area. If you have pets, the hotel in Shipshewana is pet friendly.
If there is work to be done on your unit, then there is the issue of availability of parts.
What you request may seem simple on the surface, but difficult to carry out in a matter of just a few days.
I would first do a very thorough PDI myself, before I accept the unit, and use it for a while, and compile a list of repairs, and possible upgrades.
I go up every two years from the Dallas area, and it is pretty much a one week to 10 days comitment.