The die is cast so we can only help by making the outcome better. Ranting about the state of affairs of the US and it's spending habits, raising chickens for food, or seeking a second job to be "just like me", isn't helping.
What I would do is screw down a small metal letter box with a hasp for lock in a storage compartment. Every time you use the RV or as budget allows, toss a $20 in there. You could either access the money monthly, wait for an accumulation, or save the whole for repairs and maintenance. I would definitely try to chip at the principal of the loan as that will reap huge benefits.
Good luck with your new rig and have some fun with it.
