The only way you'll have no surprises is to make sure you do a quality pre delivery inspection before closing the deal. The dealer should have a sheet he'll want you to sign off on that goes in his package showing how they tested everything. They don't. It's up to you to see that it gets done. Your trailer should be hooked up to water and shore power when you arrive to check it out. Check all faucets and drain points for leaks now. Operate every switch and make sure you're familiar with them and that they all work. TV, sound system heater, a/c, jacks, leveling system, etc.. Check everything and if you don't understand how to use it, ask questions now. This is your time and they are allocate4d time to show you. Take advantage of it.
Too many people get excited and just drag their new rigs off the lot only to be plagued with so many minor issues that they get overwhelmed and think they have a lemon. Then, they begin to bash their product when most of the issues are expected in shipment and didn't get the time for a complete make ready. Make sure your rig gets the make ready and eliminate 90% of your potential problems. When you're comfortable with operating everything and you've insured everything is working, then and only then should you accept it and drive off. Tire pressure is an important precaution we check every time we pull our rigs. Take a gage with you and you'll see that they didn't check it.
To sum it up, It's up to you to get a good start with your new rig.
PS make sure they install your equalizer hitch for a level tow.
Good look with your endeavor and keep us posted as to your new rig. Enjoy and hope to meet you down the road.
Hope I hear good things from you and not a lot of gripes on things you should have caught ii taking delivery. There is always going to be a few things but you can eliminate the bulk of them upon delivery.
Later and have a great day.
BTW Welcome to the forum and family. Don't be a stranger. Make sure to join the HOC and try to attend a rally or ten. You'll see how Heartlanders assist and help each other. No question is dumb so don't be afraid to ask. Again, later and have a great day.