You might find RVSueandCrew.net an interesting read. It is RV Sue and her canine crew living on quite a frugal budget travelling as a solo.
One thing I've learnt after much research about going full time, there's tons of different opinions on what is the preferable rig depending often on what the writer has experienced, and there are varying ways of travelling, ie; boon docking, dispersed camping, using CGs versus Resorts, moving every few days versus time sitting in one location. Likewise, budgets seem to be all over the place for individuals/couples/families depending on how they travel, what facilities they chose and in what mode.
Take your time, do plenty of research, keep a few Pros and Cons list as you are researching based on which type of rig, which mode of travelling, whether working on the road/volunteering/hosting etc might be of interest to you. Not just from a financial point of view but from an interaction with others as well.
What interests do you have? History, Museums, Cultural, Fishing, Boating, Kayaking, Hiking, Lakes, Mountains etc.
Happy Travels Sue!