This question pops up on here from time to time. No offense intended, but usually from folks about your age. Here's a few items you need to consider before you start.
Unless you're independently wealthy, you're going to have to get a job, and after you build a work history of short stays in one place doing entry level jobs, that becomes more difficult. The nationwide unemployment rate is currently 7.6%, so employers have some flexibility in who gets hired. And they can hire entry level people for minimum wage and zero benefits right off the streets.
If you find such a job, where are you going to park? Do you plan to drive your home to work every day? What about utilities, like electric, water and sewer? At some point you're going to have to reload water, dump tanks and at least re-charge batteries. That means an RV park for at least a night. Every three or four days. And you'll need to consider traveling down south in winter and north in summer because that's the only way you can control the temps inside the RV without hookups. And what's your GF going to do all day in the parking lot while you're working? Class Bs get really small, and the scenery in the parking lot isn't very exciting.
Please think this over.