Parking RV - $$?

Hi Guys,
I am just a student, but my DH is wanting to work in another city. Eventually when I get graduated and get a few years experience I might could travel nurse to said city.

We are exploring living arrangements for him for during the week. Can anyone give me an idea of how much it cost to park your RV like a month at a time? I have NO clue how to go about finding extended stay type campgrounds.

We are trying to price this vs a small apartment. This would be in the TN area. If anyone could give me an idea of the cost I'd be "VERY" thankful!