Have an emergency fund. I put aside $0.16 per mile. When I need repairs--the money is always there.
Stay away from membership parks--of if you must buy them "second hand".
Have adequate solar resources for power.
Have a hybrid load support inverter/charger from a good company such as Victron, or Outback.
Don't drive like a madman to your destination--it will still be there if you are a couple of days later.
Avoid the interstate highways.
Make sure your insurance is for full time.
Have an exit strategy in place.
There are dozens of other good tips.
Enjoy the ride!